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 A337572 Numbers having at least one 4 in their representation in base 5. 14
 4, 9, 14, 19, 20, 21, 22, 23, 24, 29, 34, 39, 44, 45, 46, 47, 48, 49, 54, 59, 64, 69, 70, 71, 72, 73, 74, 79, 84, 89, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 129, 134 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Complementary sequence to A020654. LINKS François Marques, Table of n, a(n) for n = 1..10000 EXAMPLE 75 is not in the sequence since it is 300_5 in base 5, but 74 is in the sequence since it is 244_5 in base 5. MAPLE seq(`if`(numboccur(4, convert(n, base, 5))>0, n, NULL), n=0..100); MATHEMATICA Select[ Range[ 0, 100 ], (Count[ IntegerDigits[ #, 5 ], 4 ]>0)& ] PROG (PARI) isok(m) = #select(x->(x==4), digits(m, 5)) >= 1; \\ Michel Marcus, Sep 20 2020 CROSSREFS Cf. Numbers with at least one digit b-1 in base b : A074940 (b=3), A337250 (b=4), this sequence (b=5), A333656 (b=6), A337141 (b=7), A337239 (b=8), A338090 (b=9), A011539 (b=10), A095778 (b=11). Cf. Numbers with no digit b-1 in base b: A005836 (b=3), A023717 (b=4), A020654 (b=5), A037465 (b=6), A020657 (b=7), A037474 (b=8), A037477 (b=9), A007095 (b=10), A171397 (b=11). Sequence in context: A313080 A313081 A100213 * A043365 A023738 A070799 Adjacent sequences:  A337569 A337570 A337571 * A337573 A337574 A337575 KEYWORD nonn,base,easy AUTHOR François Marques, Sep 19 2020 STATUS approved

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Last modified January 16 15:53 EST 2021. Contains 340206 sequences. (Running on oeis4.)