A113238 Differences of nonzero tribonacci numbers.

0, 1, 2, 3, 5, 6, 9, 11, 12, 17, 20, 22, 23, 31, 37, 40, 42, 43, 57, 68, 74, 77, 79, 80, 105, 125, 136, 142, 145, 147, 148, 193, 230, 250, 261, 267, 270, 272, 273, 355, 423, 460, 480, 491, 497, 500, 502, 503, 653, 778, 846, 883, 903, 914, 920, 923, 925, 926, 1201

Offset

1,3

Links

Table of n, a(n) for n=1..59.

Formula

{a(n)} = { A000073(i) - A000073(j) such that i>=j>=2 }.

Mathematica

Union[Flatten[Differences/@Subsets[Drop[LinearRecurrence[{1, 1, 1}, {0, 0, 1}, 16], 2], {2}]]] (* James C. McMahon, Jun 22 2024 *)

Crossrefs

Cf. A000073, A001590 (subset), A113239 (primes in this sequence).

Sequence in context: A286402 A175007 A284685 * A104214 A349523 A355616

Adjacent sequences: A113235 A113236 A113237 * A113239 A113240 A113241

Keyword

easy,nonn

Author

Jonathan Vos Post, Oct 19 2005

Status

approved