A127716 a(n) = A127714(n, n*(n+1)/2).

1, 1, 3, 11, 72, 473, 3727, 39646, 412679, 4765654, 61015451, 937386045, 14126033578, 227901084348, 3941375013541, 72677938745613, 1517730017193292, 31249446089387086, 675658943143264102, 15356377683044270187

Offset

0,3

Comments

Triangle A127714 has (n+1)*(n+2)/2 terms in row n for n>=0. A127715 forms the rightmost border of triangle A127714.

Links

Table of n, a(n) for n=0..19.

Crossrefs

Cf. A127714, A127715.

Sequence in context: A056665 A345030 A378047 * A035378 A258387 A350834

Adjacent sequences: A127713 A127714 A127715 * A127717 A127718 A127719

Keyword

nonn

Author

Paul D. Hanna, Jan 24 2007

Status

approved