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A027131 a(n) = diagonal sum of left justified array T given by A027113. 0
1, 1, 2, 4, 4, 8, 11, 15, 24, 35, 48, 75, 108, 152, 232, 336, 477, 721, 1046, 1496, 2245, 3264, 4690, 7006, 10200, 14709, 21897, 31916, 46148, 68523, 99962, 144841, 214634, 313327, 454756, 672803, 982718, 1428225, 2110278, 3083747, 4486717, 6622251, 9680743, 14098072, 20789712 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..44.

FORMULA

a(n) = Sum_{k=0..n} A027113(n-k, k). - Sean A. Irvine, Oct 23 2019

CROSSREFS

Sequence in context: A034408 A227333 A223317 * A319803 A055946 A130124

Adjacent sequences:  A027128 A027129 A027130 * A027132 A027133 A027134

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 23 2019

STATUS

approved

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Last modified October 24 20:10 EDT 2020. Contains 338009 sequences. (Running on oeis4.)