The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A134862 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A134862

Wythoff ABB numbers.
(history; published version)

#20 by Joerg Arndt at Thu Aug 11 03:21:21 EDT 2022

STATUS

proposed

approved

#19 by Michel Marcus at Thu Aug 11 01:12:59 EDT 2022

STATUS

editing

proposed

#18 by Michel Marcus at Thu Aug 11 01:12:54 EDT 2022

FORMULA

a(n) = A(B(B(n))), n>=1, with A=A000201, the lower Wythoff sequence and B=A001950, the upper Wythoff sequence.

STATUS

proposed

editing

#17 by Chai Wah Wu at Wed Aug 10 21:03:42 EDT 2022

STATUS

editing

proposed

#16 by Chai Wah Wu at Wed Aug 10 21:03:36 EDT 2022

PROG

(Python)

from math import isqrt

def A134862(n): return 5*(n+isqrt(5*n**2)>>1)+3*n # Chai Wah Wu, Aug 10 2022

STATUS

approved

editing

#15 by Joerg Arndt at Sat Jun 10 11:24:26 EDT 2017

STATUS

proposed

approved

#14 by Michel Marcus at Sat Jun 10 11:16:38 EDT 2017

STATUS

editing

proposed

#13 by Michel Marcus at Sat Jun 10 11:16:32 EDT 2017

FORMULA

a(n)=A(B(B(n))), n>=1, with A=A000201, the lower Wythoff sequence and B=B001950, A001950, the upper Wythoff sequence.

STATUS

approved

editing

Discussion

Sat Jun 10

11:16

Michel Marcus: typo

#12 by N. J. A. Sloane at Sat Jun 10 08:07:35 EDT 2017

STATUS

proposed

approved

#11 by Michel Marcus at Sat Jun 10 00:24:15 EDT 2017

STATUS

editing

proposed