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A026658
Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026648.
0
1, 1, 2, 4, 6, 11, 17, 30, 47, 86, 133, 242, 375, 679, 1054, 1914, 2968, 5389, 8357, 15166, 23523, 42698, 66221, 120204, 186425, 338381, 524806, 952592, 1477398, 2681683, 4159081, 7549278, 11708359, 21252226, 32960585, 59827870
OFFSET
0,3
FORMULA
G.f.: (-x^6+2x^5+x^4+2x^3+x+1)/(x^8-4x^6-x^4-2x^2+1).
CROSSREFS
Sequence in context: A034297 A326495 A026636 * A138688 A131298 A168445
KEYWORD
nonn
STATUS
approved