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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 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 June 7 02:48 EDT 2020. Contains 334836 sequences. (Running on oeis4.)