A027326 a(n) = Sum_{k=0..m} (k+1) * A026120(n, k), where m=0 for n=0,1; m=n for n >= 2.

1, 3, 13, 48, 165, 556, 1836, 5984, 19302, 61764, 196361, 620968, 1955037, 6132060, 19171447, 59770440, 185888523, 576870516, 1786768047, 5524718520, 17056080375, 52582317228, 161900130438, 497909056776, 1529644586184, 4694679875924, 14395585776111

Offset

0,2

Links

Table of n, a(n) for n=0..26.

Crossrefs

Sequence in context: A180278 A193164 A122424 * A108946 A352028 A048482

Adjacent sequences: A027323 A027324 A027325 * A027327 A027328 A027329

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 27 2019

Status

approved