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A288838 a(n) = (1/4!)*3^(n+2)*(n+7)*(n+2)*(n+1)*(n). 3
54, 729, 6075, 40095, 229635, 1194102, 5786802, 26572050, 116917020, 496897335, 2051893701, 8269753401, 32643763425, 126557359740, 482984209620, 1817776934388, 6757388169138, 24843338857125, 90429753439935, 326206114635555, 1167092987918319, 4144371018322194 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

Index entries for linear recurrences with constant coefficients, signature (15,-90,270,-405,243).

FORMULA

O.g.f.: z*3^3*(2-3*z)/(1-3*z)^5.

a(n) = A287768(n+7,9).

PROG

(PARI) a(n)=3^n*3*n*(n+1)*(n+2)*(n+7)/8 \\ Charles R Greathouse IV, Jun 19 2017

CROSSREFS

Column k=9 of A287768.

Cf. A288834, A288835, A288836.

Sequence in context: A090835 A069980 A139178 * A157094 A232829 A093972

Adjacent sequences:  A288835 A288836 A288837 * A288839 A288840 A288841

KEYWORD

nonn,easy

AUTHOR

Gregory Gerard Wojnar, Jun 17 2017

STATUS

approved

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Last modified April 16 10:04 EDT 2021. Contains 343036 sequences. (Running on oeis4.)