A017563 (12n+3)^7.

2187, 170859375, 10460353203, 137231006679, 897410677851, 3938980639167, 13348388671875, 37725479487783, 93206534790699, 207616015289871, 425927596977747, 817215093984375, 1483273860320763, 2569093262823519

Offset

0,1

Links

Table of n, a(n) for n=0..13.

Index entries for linear recurrences with constant coefficients, signature (8, -28, 56, -70, 56, -28, 8, -1).

Formula

a(0)=2187, a(1)=170859375, a(2)=10460353203, a(3)=137231006679, a(4)=897410677851, a(5)=3938980639167, a(6)=13348388671875, a(7)=37725479487783, a(n)=8*a(n-1)-28*a(n-2)+56*a(n-3)-70*a(n-4)+56*a(n-5)- 28*a(n-6)+ 8*a(n-7)-a(n-8). - Harvey P. Dale, Sep 12 2015

Mathematica

(12*Range[0, 20]+3)^7 (* or *) LinearRecurrence[{8, -28, 56, -70, 56, -28, 8, -1}, {2187, 170859375, 10460353203, 137231006679, 897410677851, 3938980639167, 13348388671875, 37725479487783}, 20] (* Harvey P. Dale, Sep 12 2015 *)

Crossrefs

Sequence in context: A017311 A017431 A079231 * A357674 A352035 A321811

Adjacent sequences: A017560 A017561 A017562 * A017564 A017565 A017566

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved