A017553 (12n+2)^9.

512, 20661046784, 5429503678976, 165216101262848, 1953125000000000, 13537086546263552, 66540410775079424, 257327417311663616, 833747762130149888, 2357947691000000000, 5987402799531080192

Offset

0,1

Links

Table of n, a(n) for n=0..10.

Index entries for linear recurrences with constant coefficients, signature (10, -45, 120, -210, 252, -210, 120, -45, 10, -1).

Mathematica

(12*Range[0, 20]+2)^9 (* or *) LinearRecurrence[{10, -45, 120, -210, 252, -210, 120, -45, 10, -1}, {512, 20661046784, 5429503678976, 165216101262848, 1953125000000000, 13537086546263552, 66540410775079424, 257327417311663616, 833747762130149888, 2357947691000000000}, 20] (* Harvey P. Dale, May 19 2021 *)

Crossrefs

Sequence in context: A017193 A017301 A017421 * A087931 A044879 A060947

Adjacent sequences: A017550 A017551 A017552 * A017554 A017555 A017556

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved