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A027140
a(n) = Sum_{k=0..n} T(n,k) * T(n,n+k), with T given by A027113.
0
1, 3, 12, 57, 264, 1261, 6141, 30276, 150853, 758145, 3836896, 19534086, 99957904, 513756551, 2650822585, 13724435509, 71275344341, 371177285715, 1937791196448, 10139548682524, 53165765660928, 279301910804937
OFFSET
0,2
CROSSREFS
Sequence in context: A334773 A192525 A106570 * A110309 A263667 A101106
KEYWORD
nonn
STATUS
approved