id:A125198 - OEIS Search Results

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Number of magical labelings of the octahedral graph of magic sum n.

+0
1

1, 8, 40, 144, 417, 1032, 2272, 4568, 8545, 15072, 25320, 40824, 63553, 95984, 141184, 202896, 285633, 394776, 536680, 718784, 949729, 1239480, 1599456, 2042664, 2583841, 3239600, 4028584, 4971624, 6091905, 7415136, 8969728 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`M. M. Ahmed, Algebraic Combinatorics of Magic Squares, math.CO/0405476, p73.`
	MAPLE	`a := proc(r) local r2 ; r2 := r^6/120+r^5/10+25r^4/48+3r^3/2+38r^2/15+12r/5 ; if r mod 2 = 0 then r2+1 ; else r2+15/16 ; fi ; end: for n from 0 to 40 do printf("%d ", a(n)) ; od;`
	CROSSREFS	`Sequence in context: A105374 A162668 A028596 this_sequence A128639 A004405 A001789` `Adjacent sequences: A125195 A125196 A125197 this_sequence A125199 A125200 A125201`
	KEYWORD	`easy,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 25 2007`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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