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A026756 Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026747. 0
1, 3, 8, 18, 42, 90, 204, 432, 972, 2052, 4610, 9726, 21859, 46125, 103783, 219099, 493699, 1042899, 2353716, 4975350, 11247138, 23790714, 53867343, 114020601, 258571256, 547672566, 1243848888, 2636201532, 5995717860 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..28.

CROSSREFS

Sequence in context: A066425 A026679 A191524 * A216631 A026384 A322496

Adjacent sequences:  A026753 A026754 A026755 * A026757 A026758 A026759

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 20 22:20 EDT 2019. Contains 325189 sequences. (Running on oeis4.)