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 A328840 Numbers with no digit 1 in their primorial base expansion (A049345). 4
 0, 4, 12, 16, 18, 22, 24, 28, 60, 64, 72, 76, 78, 82, 84, 88, 90, 94, 102, 106, 108, 112, 114, 118, 120, 124, 132, 136, 138, 142, 144, 148, 150, 154, 162, 166, 168, 172, 174, 178, 180, 184, 192, 196, 198, 202, 204, 208, 420, 424, 432, 436, 438, 442, 444, 448, 480, 484, 492, 496, 498, 502, 504, 508, 510, 514, 522, 526 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Numbers n for which the least missing nonzero digit (A329028) in their primorial base expansion is 1. LINKS Antti Karttunen, Table of n, a(n) for n = 1..92160 PROG (PARI) A329028(n) = { my(m=Map(), p=2); while(n, mapput(m, (n%p), 1); n = n\p; p = nextprime(1+p)); for(k=1, oo, if(!mapisdefined(m, k), return(k))); }; isA328840(n) = (1 == A329028(n)); CROSSREFS Cf. A049345. Positions of ones in A329028. Cf. also A328574 and A329027. Cf. A255411 for an analogous sequence. Sequence in context: A144976 A119622 A280892 * A255411 A067575 A193022 Adjacent sequences:  A328837 A328838 A328839 * A328841 A328842 A328843 KEYWORD nonn,base AUTHOR Antti Karttunen, Nov 07 2019 STATUS approved

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Last modified March 28 05:38 EDT 2020. Contains 333073 sequences. (Running on oeis4.)