A351631 The numbers that are not doubled in column -1 of the extended Trithoff (tribonacci) array.

0, 2, 4, 6, 9, 11, 13, 15, 17, 19, 22, 24, 26, 28, 30, 33, 35, 37, 39, 41, 43, 46, 48, 50, 53, 55, 57, 59, 61, 63, 66, 68, 70, 72, 74, 77, 79, 81, 83, 85, 87, 90, 92, 94, 96, 98, 100, 103, 105, 107, 109, 111, 114, 116, 118, 120, 122, 124, 127, 129, 131, 134, 136, 138, 140, 142, 144, 147, 149, 151

Offset

1,2

Comments

Excluding zeros, these are the indices of letters b and c in the tribonacci word.

The complement of A003144: the indices of the letter a in the tribonacci word. These numbers are doubled in column -1 in the extended Trithoff array.

Links

Table of n, a(n) for n=1..70.

Crossrefs

Cf. A000073, A003144, A003145, A003146, A136175, A353083, A353084, A353086, A353090.

Sequence in context: A191231 A326494 A285593 * A248898 A207188 A085148

Adjacent sequences: A351628 A351629 A351630 * A351632 A351633 A351634

Keyword

nonn

Author

Tanya Khovanova and PRIMES STEP Senior group, May 04 2022

Status

approved