A178240 Row sums of triangle A178239.

1, 2, 3, 5, 7, 11, 16, 23, 32, 46, 64, 88, 119, 160, 213, 281, 369, 487, 640, 837, 1086, 1398, 1784, 2256, 2831, 3532, 4381, 5403, 6629, 8095, 9844, 11927, 14410, 17388, 20974, 25310, 30561, 36920, 44605, 53859, 64957, 78207, 93942, 112523, 134348, 159848, 189494, 223796, 263319, 308706, 360671

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..1000

Example

a(5) = 16 = (1 + 1 + 5 + 1 + 5 + 2 + 1).

Prog

(PARI) \\ Needs Mtx() from A178239.
{ my(A=Mtx(51)); vector(#A, n, sum(k=1, n, A[n+1-k, k])) }

Crossrefs

Cf. A178239.

Sequence in context: A366850 A024791 A373298 * A118084 A232481 A232482

Adjacent sequences: A178237 A178238 A178239 * A178241 A178242 A178243

Keyword

nonn

Author

Gary W. Adamson, May 23 2010

Extensions

a(13)-a(14) corrected and a(15) onwards from Andrew Howroyd, Sep 25 2025

Status

approved