A353083 The second column of the Trithoff (tribonacci) array.

2, 6, 9, 15, 19, 22, 26, 30, 33, 39, 43, 46, 50, 53, 59, 63, 66, 70, 74, 77, 83, 87, 90, 96, 100, 103, 107, 111, 114, 120, 124, 127, 131, 134, 140, 144, 147, 151, 155, 158, 164, 168, 171, 175, 179, 182, 188, 192, 195, 199, 202, 208, 212, 215, 219, 223, 226

Offset

1,1

Comments

These are the numbers whose tribonacci representation ends in 10.

This is a subsequence of A003145: Numbers in this sequence indicate positions of letter b in the tribonacci word, but not all such positions.

Links

Table of n, a(n) for n=1..57.

Example

The first few tribonacci numbers are 1, 2, 4, 7, 13, 24. The number 43 can be represented as 24+13+4+2. Thus, its tribonacci representation is 110110, and 43 is in this sequence.

Crossrefs

Cf. A000073, A003145, A003265, A136175, A353084, A353086, A353090.

Sequence in context: A327967 A189760 A363373 * A049634 A120387 A325761

Adjacent sequences: A353080 A353081 A353082 * A353084 A353085 A353086

Keyword

nonn

Author

Tanya Khovanova and PRIMES STEP Senior group, Apr 22 2022

Status

approved