The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A057452 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A057452

Prime recurrence: a(1)=8, a(n+1) = a(n)-th prime.
(history; published version)

#25 by Giovanni Resta at Fri Mar 10 19:42:00 EST 2017

STATUS

proposed

approved

#24 by Jon E. Schoenfield at Tue Mar 07 20:17:48 EST 2017

STATUS

editing

proposed

#23 by Jon E. Schoenfield at Tue Mar 07 20:17:44 EST 2017

COMMENTS

Lubomir Alexandrov informs me that he studied this sequence in his 1965 notebook. - N. J. A. Sloane, May 23 2008.

EXTENSIONS

a(14)-a(16) from Robert G. Wilson v, Mar 07 2017 using Kim Walisch's primecount.

STATUS

proposed

editing

#22 by Michel Marcus at Tue Mar 07 14:34:52 EST 2017

STATUS

editing

proposed

#21 by Michel Marcus at Tue Mar 07 14:34:44 EST 2017

EXTENSIONS

a(14), a(15) & -a(16) from Robert G. Wilson v, Mar 07 2017 using Kim Walisch's primecount.

STATUS

proposed

editing

Discussion

Tue Mar 07

14:34

Michel Marcus: as shown just above

#20 by Robert G. Wilson v at Tue Mar 07 10:53:00 EST 2017

STATUS

editing

proposed

#19 by Robert G. Wilson v at Tue Mar 07 10:52:58 EST 2017

DATA

8, 19, 67, 331, 2221, 19577, 219613, 3042161, 50728129, 997525853, 22742734291, 592821132889, 17461204521323, 575411103069067, 21034688742654437, 846729487306354343

EXTENSIONS

a(14), a(15) & a(16) from Robert G. Wilson v, Mar 07 2017 using Kim Walisch's primecount.

STATUS

approved

editing

#18 by Bruno Berselli at Wed Apr 06 06:04:50 EDT 2016

STATUS

proposed

approved

#17 by Michel Marcus at Wed Apr 06 05:43:12 EDT 2016

STATUS

editing

proposed

#16 by Michel Marcus at Wed Apr 06 04:39:05 EDT 2016

REFERENCES

Lubomir Alexandrov, "Prime Number Sequences And Matrices Generated By Counting Arithmetic Functions", Communications of the Joint Institute of Nuclear Research, E5-2002-55, Dubna, 2002.

D. W. Matula, A natural rooted tree enumeration by prime factorization, SIAM Review, 10, 1968, 273.