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A027250
a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026780.
0
1, 12, 95, 639, 3917, 23377, 132553, 762434, 4201955, 23901906, 130453555, 740755012, 4035754137, 22952934073, 125259143235, 714206660342, 3909459844469, 22346990842402, 122748276118411, 703146926077588, 3875572768594421, 22238537172443007, 122969745150601115
OFFSET
3,2
CROSSREFS
Sequence in context: A038836 A026860 A021074 * A194782 A059154 A204630
KEYWORD
nonn
EXTENSIONS
More terms from Sean A. Irvine, Oct 26 2019
STATUS
approved