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URL: https://oeis.org/A048119

⇱ A048119 - OEIS

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A048119
a(n)=(1/2)*T(2n+1,n+1), where T is given by A048113.
0
1, 3, 9, 30, 102, 360, 1290, 4704, 17334, 64512, 241836, 912384, 3459876, 13178988, 50389236, 193295652, 743610528, 2867892588, 11085281328, 42933166380, 166575534264, 647329281456, 2519234973996, 9817121868084
OFFSET
2,2
CROSSREFS
Sequence in context: A090573 A228339 A257641 * A304823 A317875 A056333
KEYWORD
nonn
STATUS
approved