id:A062106 - OEIS Search Results

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Number of ways a black pawn (from any starting square on the second back rank) can (theoretically) end on the n-th square of the leftmost file counted from the back rank.

+0
2

0, 1, 2, 6, 15, 40, 109, 302, 846, 2390, 6796, 19426, 55767, 160668, 464305, 1345282, 3906701, 11367696, 33135987, 96740610, 282831981, 827939880, 2426431239, 7118546874, 20904025380, 61439768166, 180725813478, 532004277518 (list; graph; listen)

	OFFSET	`1,3`
	MAPLE	`[seq(ChessPawnTriangle(j, 1), j=1..40)];`
	CROSSREFS	`The left column of table A062104. Cf. also A062107.` `Sequence in context: A121331 A026270 A001654 this_sequence A061322 A004664 A074446` `Adjacent sequences: A062103 A062104 A062105 this_sequence A062107 A062108 A062109`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen May 30 2001`

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

AT&T Labs Research