A125116 - OEIS

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A125116

Number of 8 X 8 pandiagonal Franklin squares with magic sum 4n.

1, 32, 417, 3072, 15585, 60960, 197057, 550912, 1374273, 3127840, 6602849, 13089792, 24605217, 44188704, 76283265, 127213568, 205777537, 323968032, 497842465, 748559360, 1103602017, 1598210592, 2277045057, 3196102656 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`M. M. Ahmed, Algebraic Combinatorics of Magic Squares, math.CO/0405476.`
	FORMULA	`a(n)=s^8/2293760+s^7/71680+s^6/3840+s^5/320+s^4/40+2s^3/15+197s^2/420+106s/105+1 where s=4n [Ahmed].`
	MAPLE	`a := proc(n) local s ; s :=4n ; s^8/2293760+s^7/71680+s^6/3840+s^5/320+s^4/40+2s^3/15+197s^2/420+106s/105+1 ; end: for n from 0 to 30 do printf("%d ", a(n)) ; od;`
	CROSSREFS	`Sequence in context: A195191 A061594 A145403 * A145217 A125444 A022692` `Adjacent sequences: A125113 A125114 A125115 * A125117 A125118 A125119`
	KEYWORD	`easy,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 25 2007`

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Last modified February 16 05:55 EST 2012. Contains 205860 sequences.