The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A366079 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A366079

Perfect squares in A005728.
(history; published version)

#29 by Hugo Pfoertner at Fri Sep 29 03:36:30 EDT 2023

STATUS

proposed

approved

#28 by Amiram Eldar at Fri Sep 29 03:23:32 EDT 2023

STATUS

editing

proposed

#27 by Amiram Eldar at Fri Sep 29 03:23:27 EDT 2023

KEYWORD

nonn,more,new

STATUS

proposed

editing

#26 by Michel Marcus at Fri Sep 29 02:54:33 EDT 2023

STATUS

editing

proposed

#25 by Michel Marcus at Fri Sep 29 02:54:16 EDT 2023

PROG

select(x->issquare(x), apply(f, [0..10^5])) \\ _Michel Marcus_, Sep 28 2023

STATUS

approved

editing

Discussion

Fri Sep 29

02:54

Michel Marcus: I forgot to sign program

#24 by Michael De Vlieger at Thu Sep 28 22:22:01 EDT 2023

STATUS

reviewed

approved

#23 by Hugo Pfoertner at Thu Sep 28 18:45:28 EDT 2023

STATUS

proposed

reviewed

Discussion

Thu Sep 28

19:43

Stuart E Anderson: If you take the square roots of the terms, of the 21 terms greater than 1, 8 of them are prime numbers, much greater than what you would expect according to the Prime Number Theorem.

#22 by Hugo Pfoertner at Thu Sep 28 18:45:20 EDT 2023

STATUS

editing

proposed

#21 by Hugo Pfoertner at Thu Sep 28 18:45:09 EDT 2023

DATA

1, 81, 121, 361, 1352569, 2140369, 6416089, 9186961, 30261001, 108056025, 820765201, 2331248089, 170938421809, 8189950752481, 8870860603201, 33527956250889, 136943052939289, 149526943190641, 4953581020385761, 509672946670475329, 578899033007097609, 2043000477545048329

EXTENSIONS

a(13)-a(1922) from Hugo Pfoertner, Sep 28 2023

STATUS

proposed

editing

#20 by Hugo Pfoertner at Thu Sep 28 16:01:01 EDT 2023

STATUS

editing

proposed

Discussion

Thu Sep 28

16:52

Stuart E Anderson: The reason I became interested in this sequence is that I was looking at associating the moves in a Go game with musical notes, so that as stones are placed on the board, notes are played.   Go boards are either the smaller board of 9x9 or the standard larger 19x19.   I noticed the number of Farey fractions of orders  16 and 34 were 81 and 361 and were perfect for giving a range of just intonation frequency intervals over the octave