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A026103
a(n) = T(n,1) + T(n-1,2) + ...+ T(n-k+1,k), where k = floor((n+1)/2) and T is the array defined in A026098.
0
1, 3, 7, 13, 25, 36, 62, 78, 126, 152, 244, 266, 419, 423, 637, 679, 932, 1007, 1307, 1419, 1697, 1918, 2229, 2514, 2899, 3300, 3672, 4223, 4663, 5298, 5682, 6495, 6988, 7619, 8324, 9289, 9861, 11033, 11697, 12812, 13727, 14956, 16008, 17298, 18473, 19701, 21186, 22502
OFFSET
1,2
COMMENTS
a(n) is the sum of the terms of the n-th antidiagonal of triangle A026098. - Sean A. Irvine, Sep 16 2019
CROSSREFS
Sequence in context: A309051 A056764 A360783 * A328652 A301854 A092463
KEYWORD
nonn
EXTENSIONS
a(11) onward corrected and more terms from Sean A. Irvine, Sep 16 2019
STATUS
approved