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Search: id:A098730
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A098730 Sum[i=0..n, Sum[j=0..n, C(n-i,i+j) * C(n-j,i+j) ]]. +0
1
1, 1, 5, 14, 46, 145, 462, 1465, 4641, 14671, 46298, 145858, 458811, 1441204, 4521255, 14167145, 44344445, 138665650, 433218100, 1352333899, 4218220602, 13148256139, 40956562683, 127501720725, 396702130246, 1233632920766 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A100059 A077335 A126729 this_sequence A163608 A081496 A152051

Adjacent sequences: A098727 A098728 A098729 this_sequence A098731 A098732 A098733

KEYWORD

nonn

AUTHOR

Ralf Stephan, Oct 28 2004

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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