The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A061789 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A061789

a(n) = Sum_{k=1..n} prime(k)^prime(k).
(history; published version)

#28 by N. J. A. Sloane at Fri Jun 17 16:05:47 EDT 2022

STATUS

proposed

approved

#27 by Chai Wah Wu at Fri Jun 17 15:51:27 EDT 2022

STATUS

editing

proposed

#26 by Chai Wah Wu at Fri Jun 17 15:51:08 EDT 2022

PROG

(Python)

from itertools import accumulate, count, islice

from sympy import prime

def A061789_gen(): # generator of terms

yield from accumulate(((p:=prime(k))**p for k in count(1)))

A061789_list = list(islice(A061789_gen(), 20)) # Chai Wah Wu, Jun 17 2022

STATUS

approved

editing

#25 by Vaclav Kotesovec at Mon Dec 06 04:20:36 EST 2021

STATUS

editing

approved

#24 by Vaclav Kotesovec at Mon Dec 06 04:20:32 EST 2021

CROSSREFS

Cf. A051674.

STATUS

approved

editing

#23 by N. J. A. Sloane at Fri Dec 15 17:35:05 EST 2017

EXTENSIONS

Corrected and extended by _Jason Earls (zevi_35711(AT)yahoo.com), _, May 26 2001

Discussion

Fri Dec 15

17:35

OEIS Server: https://oeis.org/edit/global/2722

#22 by Michel Marcus at Sun Jan 08 02:48:09 EST 2017

STATUS

reviewed

approved

#21 by Joerg Arndt at Sun Jan 08 02:44:10 EST 2017

STATUS

proposed

reviewed

Discussion

Sun Jan 08

02:48

Michel Marcus: Thanks

#20 by Jon E. Schoenfield at Sun Jan 08 01:58:49 EST 2017

STATUS

editing

proposed

Discussion

Sun Jan 08

02:44

Joerg Arndt: Yes, much better.

#19 by Jon E. Schoenfield at Sun Jan 08 01:58:32 EST 2017

NAME

a(n) = Sum_{k=1..n} prime(k)^prime(k), prime(k) = k-th prime (A000040).

EXAMPLE

a(3) = 2^2 + 3^3 + 5^5 = 3156.

STATUS

proposed

editing

Discussion

Sun Jan 08

01:58

Jon E. Schoenfield: Is shortened name okay?