A140801 a(0)=360, a(n) = a(n-1) + 720 for n>=1.

360, 1080, 1800, 2520, 3240, 3960, 4680, 5400, 6120, 6840, 7560, 8280, 9000, 9720, 10440, 11160, 11880, 12600, 13320, 14040, 14760, 15480, 16200, 16920, 17640, 18360, 19080, 19800, 20520, 21240, 21960, 22680, 23400, 24120, 24840, 25560, 26280, 27000, 27720, 28440, 29160

Offset

0,1

Links

Table of n, a(n) for n=0..40.

Tanya Khovanova, Recursive Sequences.

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

Formula

a(n) = 360 + 720*n.

From Elmo R. Oliveira, Apr 02 2026: (Start)

G.f.: 360*(x + 1)/(x - 1)^2.

E.g.f.: 360*(2*x + 1)*exp(x).

a(n) = 360*A005408(n).

a(n) = 2*a(n-1) - a(n-2). (End)

Mathematica

NestList[720+#&, 360, 40] (* or *) 720*Range[0, 40]+360 (* Harvey P. Dale, Jan 24 2017 *)

Crossrefs

Cf. A005408, A069476 (same sequence, starting with 1800).

Sequence in context: A158308 A205738 A112536 * A236059 A206670 A236991

Adjacent sequences: A140798 A140799 A140800 * A140802 A140803 A140804

Keyword

nonn,easy,less

Author

Paul Curtz, Jul 15 2008

Status

approved