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 A003265 Not representable by truncated tribonacci sequence 2, 4, 7, 13, 24, 44, 81, .... (Formerly M2430) 4
 1, 3, 5, 8, 10, 12, 14, 16, 18, 21, 23, 25, 27, 29, 32, 34, 36, 38, 40, 42, 45, 47, 49, 52, 54, 56, 58, 60, 62, 65, 67, 69, 71, 73, 76, 78, 80, 82, 84, 86, 89, 91, 93, 95, 97, 99, 102, 104, 106, 108, 110, 113, 115, 117, 119, 121, 123 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The usual tribonacci representation of n writes n as a sum of tribonacci numbers 1, 2, 4, 7, 13, 24, ... (A000073) avoiding using three consecutive numbers (see A003726, A278038). But if we are not allowed to use 1, then not all numbers can be represented, and such numbers are listed here. - N. J. A. Sloane, Oct 08 2018 Indices of odd terms of A003726. - Charlie Neder, Apr 25 2019 Numbers whose tribonacci representation ends in 1. Equivalently, the first column of the Trithoff (tribonacci) array, see A136175. - Tanya Khovanova and PRIMES STEP Senior group, May 07 2022 REFERENCES A. Brousseau, Fibonacci and Related Number Theoretic Tables. Fibonacci Association, San Jose, CA, 1972, p. 65. N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Charlie Neder, Table of n, a(n) for n = 1..1000 A. Brousseau, Fibonacci and Related Number Theoretic Tables, Fibonacci Association, San Jose, CA, 1972, p. 65. CROSSREFS Cf. A000073, A003726, A136175, A278038. Sequence in context: A096985 A206909 A138829 * A193714 A184584 A342871 Adjacent sequences:  A003262 A003263 A003264 * A003266 A003267 A003268 KEYWORD nonn AUTHOR EXTENSIONS Edited by N. J. A. Sloane, Oct 08 2018 a(47)-a(57) from Charlie Neder, Apr 25 2019 STATUS approved

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Last modified June 29 07:33 EDT 2022. Contains 354910 sequences. (Running on oeis4.)