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A027959 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 A027948. 0
1, 1, 2, 3, 5, 7, 12, 16, 27, 37, 59, 85, 129, 192, 285, 428, 634, 949, 1412, 2104, 3140, 4671, 6973, 10378, 15478, 23058, 34362, 51216, 76305, 113736, 169465, 252561, 376362, 560851, 835821, 1245503, 1856132, 2765976, 4121947 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..39.

FORMULA

Empirical g.f.: -x*(x^4-x^3-x^2+x+1) / ((x-1)*(x+1)*(x^4-x^3-2*x^2+1)). - Colin Barker, Nov 25 2014

CROSSREFS

Sequence in context: A319635 A179822 A319769 * A060730 A123569 A305651

Adjacent sequences:  A027956 A027957 A027958 * A027960 A027961 A027962

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 18 01:36 EST 2019. Contains 319260 sequences. (Running on oeis4.)