The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A061910 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A061910

Positive numbers k such that sum of digits of k^2 is a square.
(history; published version)

#39 by N. J. A. Sloane at Sat Mar 09 11:05:40 EST 2024

STATUS

proposed

approved

#38 by Stefano Spezia at Sat Mar 09 02:46:36 EST 2024

STATUS

editing

proposed

#37 by Stefano Spezia at Sat Mar 09 02:46:17 EST 2024

NAME

Positive numbers n k such that sum of digits of nk^2 is a square.

STATUS

approved

editing

#36 by N. J. A. Sloane at Fri Oct 27 22:00:47 EDT 2023

AUTHOR

_Asher Auel (asher.auel(AT)reed.edu), _, May 17 2001

Discussion

Fri Oct 27

22:00

OEIS Server: https://oeis.org/edit/global/2974

#35 by Charles R Greathouse IV at Thu Sep 08 08:45:03 EDT 2022

PROG

(MAGMAMagma) [ n: n in [1..185] | IsSquare(&+Intseq(n^2)) ]; // Bruno Berselli, Jul 29 2011

Discussion

Thu Sep 08

08:45

OEIS Server: https://oeis.org/edit/global/2944

#34 by N. J. A. Sloane at Wed Oct 18 13:26:10 EDT 2017

STATUS

editing

approved

#33 by N. J. A. Sloane at Wed Oct 18 13:26:07 EDT 2017

NAME

Numbers Positive numbers n such that sum of digits of n^2 is a square.

COMMENTS

Obviously, 0 would also satisfy the definition as phrased as of today. - M. F. Hasler, Oct 16 2017

STATUS

proposed

editing

#32 by Michel Marcus at Tue Oct 17 01:07:22 EDT 2017

STATUS

editing

proposed

#31 by Michel Marcus at Tue Oct 17 01:06:55 EDT 2017

PROG

(PARI) select( is_A061910(n)=issquare(sumdigits(n^2)), [0..199]) \\ Includes the initial 0. - M. F. Hasler, Oct 16 2017

STATUS

proposed

editing

Discussion

Tue Oct 17

01:07

Michel Marcus: pari mit pari

#30 by M. F. Hasler at Mon Oct 16 21:48:11 EDT 2017

STATUS

editing

proposed

Discussion

Mon Oct 16

21:48

M. F. Hasler: ( A29383 pending for publication )