login
A026952
a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026386.
0
1, 4, 24, 90, 541, 2032, 12275, 46472, 282003, 1075404, 6549906, 25125114, 153481299, 591529776, 3622111560, 14013307170, 85975792075, 333669151420, 2050493623760, 7978700883230, 49098707209695, 191470222802880, 1179633190545755, 4608890486329844, 28423658754983701
OFFSET
1,2
CROSSREFS
Sequence in context: A026694 A026967 A026977 * A222670 A225681 A259814
KEYWORD
nonn
EXTENSIONS
More terms from Sean A. Irvine, Oct 17 2019
STATUS
approved