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%I #12 Nov 04 2022 07:31:20
%S 0,2,4,6,9,11,13,15,17,19,22,24,26,28,30,33,35,37,39,41,43,46,48,50,
%T 53,55,57,59,61,63,66,68,70,72,74,77,79,81,83,85,87,90,92,94,96,98,
%U 100,103,105,107,109,111,114,116,118,120,122,124,127,129,131,134,136,138,140,142,144,147,149,151
%N The numbers that are not doubled in column -1 of the extended Trithoff (tribonacci) array.
%C Excluding zeros, these are the indices of letters b and c in the tribonacci word.
%C 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.
%Y Cf. A000073, A003144, A003145, A003146, A136175, A353083, A353084, A353086, A353090.
%K nonn
%O 1,2
%A _Tanya Khovanova_ and PRIMES STEP Senior group, May 04 2022
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