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A054111 Row sums of array T as in A054110. 0
1, 2, 7, 18, 39, 82, 167, 338, 679, 1362, 2727, 5458, 10919, 21842, 43687, 87378, 174759, 349522, 699047, 1398098, 2796199, 5592402, 11184807, 22369618, 44739239, 89478482, 178956967, 357913938, 715827879, 1431655762 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..29.

Index entries for linear recurrences with constant coefficients, signature (2,1,-2)

FORMULA

G.f.: [1+2x^2+4x^3]/[(1-x^2)(1-2x)]. - Ralf Stephan, Apr 03 2004

a(n+1) = 2^(n+4)/3 -7/2 +(-1)^n/6, n>0. - R. J. Mathar, May 20 2013

CROSSREFS

Sequence in context: A086741 A229183 A051743 * A295054 A192955 A055503

Adjacent sequences:  A054108 A054109 A054110 * A054112 A054113 A054114

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 20 20:55 EST 2019. Contains 320345 sequences. (Running on oeis4.)