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A027167 Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A027157. 0
1, 2, 4, 7, 15, 24, 50, 81, 165, 266, 544, 875, 1787, 2876, 5870, 9445, 19281, 31022, 63324, 101887, 207975, 334624, 683050, 1099001, 2243325, 3609426, 7367704, 11854355, 24197587, 38932996, 79471590, 127866765, 261006761 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..32.

FORMULA

Empirical g.f.: (1+x)^2*(1-x+x^2) / ((1-x)*(1-2*x^2-3*x^4-4*x^6)). - Colin Barker, Feb 20 2016

CROSSREFS

Sequence in context: A019998 A002956 A171276 * A232464 A264292 A259592

Adjacent sequences:  A027164 A027165 A027166 * A027168 A027169 A027170

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 27 17:22 EDT 2016. Contains 275100 sequences.