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A027947 a(n) = Sum{T(k,n-k)}, k = m,m+1,...,n, where m=[ (n+1)/2 ]; a(n) is the n-th diagonal-sum of left justified array T given by A027935. 0
1, 1, 2, 3, 4, 7, 9, 15, 21, 32, 48, 70, 107, 156, 236, 349, 521, 778, 1155, 1728, 2567, 3833, 5707, 8505, 12680, 18884, 28158, 41943, 62520, 93160, 138825, 206897, 308290, 459459, 684652, 1020311, 1520473, 2265815, 3376605 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..38.

FORMULA

G.f.: (x+1)/(x^4-x^3-2x^2+1).

CROSSREFS

Sequence in context: A108809 A276846 A303665 * A324736 A293853 A067236

Adjacent sequences:  A027944 A027945 A027946 * A027948 A027949 A027950

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)