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URL: https://oeis.org/A027309

⇱ A027309 - OEIS

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A027309
a(n) = Sum_{k=0..n+1} T(n,k) * T(n,k+1), with T given by A026323.
0
2, 16, 123, 956, 7519, 59742, 478869, 3868104, 31458348, 257396972, 2117494621, 17504651148, 145341743066, 1211584784416, 10136488835157, 85085339305360, 716366098507550, 6048143934750432, 51194316337883625, 434360166677159652, 3693446859517381827
OFFSET
1,1
CROSSREFS
Sequence in context: A341925 A229808 A301947 * A391220 A241466 A069868
KEYWORD
nonn
EXTENSIONS
More terms and title corrected by Sean A. Irvine, Oct 27 2019
STATUS
approved