A047109 T(2n,n), array T as in A047100.

1, 1, 5, 31, 151, 917, 5619, 33627, 210911, 1326395, 8366161, 53441835, 342477957, 2203613164, 14248253995, 92379163952, 600644552471, 3915699367751, 25579440322831, 167423682425912, 1097738520430457, 7208383257398805

Offset

0,3

Links

Table of n, a(n) for n=0..21.

Crossrefs

Sequence in context: A005826 A293716 A294692 * A293028 A165610 A092496

Adjacent sequences: A047106 A047107 A047108 * A047110 A047111 A047112

Keyword

nonn

Author

Definition revised by Clark Kimberling, Dec 08 2006

Extensions

Name corrected by Sean A. Irvine, Jan 12 2025

Status

approved