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A026636 Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026626. 1
1, 1, 2, 4, 6, 11, 17, 30, 47, 78, 125, 205, 330, 536, 866, 1404, 2270, 3675, 5945, 9622, 15567, 25190, 40757, 65949, 106706, 172656, 279362, 452020, 731382, 1183403, 1914785, 3098190, 5012975, 8111166, 13124141, 21235309 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..35.

FORMULA

G.f.: (x^7+x^5-x^4+x^3+1)/[(1-x^4)(1-x-x^2)].

CROSSREFS

Sequence in context: A014217 A034297 A326495 * A026658 A138688 A131298

Adjacent sequences:  A026633 A026634 A026635 * A026637 A026638 A026639

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 22 12:00 EST 2020. Contains 332135 sequences. (Running on oeis4.)