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 A320601 Exponents of powers of two having a digit zero in decimal. 1
 10, 11, 12, 17, 20, 21, 22, 23, 26, 29, 30, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 68, 69, 70, 71, 73, 74, 75, 78, 79, 80, 82, 83, 84, 85, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Complement of A007377. It is a long-standing open problem to show that this sequence contains all numbers > 86. LINKS FORMULA { n | A027870(n) > 0}, where A027870 = A055641 o A000079. EXAMPLE The first term is a(1) = 10 since 2^10 = 1024 is the smallest power of 2 having a digit 0. PROG (PARI) for(n=1, 199, vecmin(digits(2^n))||print1(n", ")) CROSSREFS Cf. A000079, A007377, A027870, A055641. Sequence in context: A258744 A219251 A154770 * A305130 A098395 A207968 Adjacent sequences:  A320598 A320599 A320600 * A320602 A320603 A320604 KEYWORD nonn,base AUTHOR M. F. Hasler, Oct 16 2018 STATUS approved

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Last modified April 22 22:19 EDT 2021. Contains 343197 sequences. (Running on oeis4.)