A047069 T(2n,n), array T as in A047060.

1, 2, 9, 50, 292, 1757, 10809, 67473, 425711, 2707757, 17332058, 111508304, 720429774, 4670990039, 30375989547, 198050065342, 1294186149138, 8473767434587, 55579644024480, 365116858320540, 2401901294047629, 15820713708790749, 104326220133691996

Offset

0,2

Links

Table of n, a(n) for n=0..22.

Crossrefs

Sequence in context: A274066 A055997 A115599 * A225006 A211789 A192945

Adjacent sequences: A047066 A047067 A047068 * A047070 A047071 A047072

Keyword

nonn

Author

Clark Kimberling

Extensions

Data corrected by Sean A. Irvine, May 11 2021

Status

approved