A290156 Tribonacci-like sequence of composite numbers with a(0) = 99202581681909167232, a(1) = 67600144946390082339 and a(2) = 139344212815127987596.

99202581681909167232, 67600144946390082339, 139344212815127987596, 306146939443427237167, 513091297204945307102, 958582449463500531865, 1777820686111873076134, 3249494432780318915101, 5985897568355692523100, 11013212687247884514335

Offset

0,1

Links

Seiichi Manyama, Table of n, a(n) for n = 0..3704

Ivan Lunev, A Tribonacci-Like Sequence of Composite Numbers, Journal of Integer Sequences, Vol. 20 (2017), Article 17.3.2.

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

Formula

From Colin Barker, Jul 22 2017: (Start)

G.f.: (99202581681909167232 - 31602436735519084893*x - 27458513813171261975*x^2) / (1 - x - x^2 - x^3).

a(n) = a(n-1) + a(n-2) + a(n-3) for n>2.

(End)

Prog

(PARI) Vec((99202581681909167232 - 31602436735519084893*x - 27458513813171261975*x^2) / (1 - x - x^2 - x^3) + O(x^20)) \\ Colin Barker, Jul 22 2017

Crossrefs

Cf. A000073, A290157.

Sequence in context: A321136 A135955 A104840 * A095436 A247262 A046061

Adjacent sequences: A290153 A290154 A290155 * A290157 A290158 A290159

Keyword

nonn,easy

Author

Seiichi Manyama, Jul 22 2017

Status

approved