A290157 Tribonacci-like sequence of composite numbers with a(0) = 151646890045, a(1) = 836564809606 and a(2) = 942785024683.

151646890045, 836564809606, 942785024683, 1930996724334, 3710346558623, 6584128307640, 12225471590597, 22519946456860, 41329546355097, 76074964402554, 139924457214511, 257328967972162, 473328389589227, 870581814775900, 1601239172337289, 2945149376702416

Offset

0,1

Links

Seiichi Manyama, Table of n, a(n) for n = 0..3735

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.: (151646890045 + 684917919561*x - 45426674968*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((151646890045 + 684917919561*x - 45426674968*x^2) / (1 - x - x^2 - x^3) + O(x^20)) \\ Colin Barker, Jul 22 2017

Crossrefs

Cf. A000073, A290156.

Sequence in context: A186177 A104832 A234379 * A288283 A271819 A304235

Adjacent sequences: A290154 A290155 A290156 * A290158 A290159 A290160

Keyword

nonn,easy

Author

Seiichi Manyama, Jul 22 2017

Status

approved