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 A257473 Composite numbers whose digits appear in their prime factors. 0
 22, 33, 55, 77, 95, 122, 132, 155, 202, 222, 272, 303, 312, 322, 326, 332, 333, 344, 366, 399, 505, 515, 555, 707, 731, 735, 777, 912, 955, 973, 995, 1010, 1030, 1070, 1090, 1111, 1112, 1122, 1131, 1133, 1155, 1173, 1177, 1192, 1197, 1199, 1202, 1212, 1222 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..49. L. Blomberg, in reply to E. Angelini, Any digit of a(n) is visible in a(n)'s factorization, April 29, 2015. EXAMPLE See the link. PROG (PARI) is(n)=!isprime(n)&&n>1&&!#setminus(Set(digits(n)), Set(concat(apply(f->digits(f), factor(n)[, 1]~)))) \\ M. F. Hasler, May 08 2015 CROSSREFS Sequence in context: A026044 A120146 A138840 * A116063 A131317 A176597 Adjacent sequences: A257470 A257471 A257472 * A257474 A257475 A257476 KEYWORD nonn,base AUTHOR Eric Angelini and M. F. Hasler, May 08 2015 STATUS approved

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Last modified August 14 07:30 EDT 2024. Contains 375146 sequences. (Running on oeis4.)