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A027054 a(n) = T(n, n+3), T given by A027052. 0
1, 8, 23, 52, 107, 210, 401, 754, 1405, 2604, 4811, 8872, 16343, 30086, 55365, 101862, 187385, 344688, 634015, 1166172, 2144963, 3945242, 7256473, 13346778, 24548597, 45151956, 83047443, 152748112, 280947631, 516743310 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..32.

FORMULA

Conjectures from Colin Barker, Feb 19 2016: (Start)

a(n) = 3*a(n-1)-2*a(n-2)-a(n-4)+a(n-5) for n>6.

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

(End)

CROSSREFS

Sequence in context: A225280 A218711 A270694 * A048467 A002765 A048770

Adjacent sequences:  A027051 A027052 A027053 * A027055 A027056 A027057

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 17 15:29 EDT 2018. Contains 316283 sequences. (Running on oeis4.)