id:A110136 - OEIS Search Results

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Sums of anti-diagonals of number square A110135.

+0
2

1, 3, 9, 31, 115, 447, 1803, 7499, 32069, 140795, 633981, 2925671, 13826405, 66861107, 330544409, 1669024071, 8598951451, 45160258503, 241540648011, 1314519420803, 7273377034547, 40886211572271, 233344325395327 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Also row sums of A110135, when read as number triangle.`
	FORMULA	`a(n)=sum{j=0..floor((n-k)/2), C(n-k, j)C(2(n-k-j), n-k)k^j}`
	CROSSREFS	`Sequence in context: A052709 A049179 A049154 this_sequence A151034 A151035 A151036` `Adjacent sequences: A110133 A110134 A110135 this_sequence A110137 A110138 A110139`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 13 2005`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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