A127498 Secondary diagonal of triangle A127496: a(n) = A127496(n+1,n) for n>=0.

1, 2, 5, 16, 53, 186, 672, 2465, 9158, 34354, 129833, 493534, 1884955, 7227522, 27804584, 107268790, 414852381, 1607836478, 6243201267, 24282747900, 94587991975, 368940451638, 1440796181876, 5632827891526, 22043782012620

Offset

0,2

Links

Table of n, a(n) for n=0..24.

Crossrefs

Cf. A127496, A127497.

Sequence in context: A047063 A268430 A047006 * A149958 A148395 A148396

Adjacent sequences: A127495 A127496 A127497 * A127499 A127500 A127501

Keyword

nonn

Author

Paul D. Hanna, Jan 16 2007

Status

approved