A027256 a(n) = Sum_{k=0..n} (k+1) * A026703(n, k).

1, 3, 10, 30, 81, 224, 564, 1485, 3605, 9207, 21846, 54665, 127687, 314895, 727176, 1774018, 4061295, 9825774, 22342050, 53699310, 121438581, 290333324, 653649804, 1555933100, 3489984875, 8277300090, 18507864886, 43760782384, 97585469205

Offset

0,2

Links

Table of n, a(n) for n=0..28.

Crossrefs

Cf. A026703.

Sequence in context: A026960 A026990 A254822 * A332360 A115515 A280523

Adjacent sequences: A027253 A027254 A027255 * A027257 A027258 A027259

Keyword

nonn

Author

Clark Kimberling

Extensions

a(22) and a(28) corrected by Sean A. Irvine, Oct 26 2019

Status

approved