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A027311
a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+3), with T given by A026323.
0
4, 43, 396, 3465, 29730, 253008, 2145968, 18184052, 154119660, 1307389666, 11104039000, 94441581936, 804428517984, 6862216318250, 58625961078432, 501592568400544, 4297633705136632, 36872583343109643, 316774930400206020
OFFSET
2,1
CROSSREFS
Sequence in context: A186678 A186768 A130545 * A198205 A277639 A326432
KEYWORD
nonn
EXTENSIONS
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 23 2003
Title corrected by Sean A. Irvine, Oct 27 2019
STATUS
approved