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 A264688 The decimal digits of n appear n times in the decimal representation of n!. 0
 0, 1, 1170, 1528, 9877, 9886, 9897, 11535 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS There are no more terms up to n=21000, checked using the Python program below. a(9) > 200000. - Dana Jacobsen, Jan 03 2016 LINKS Table of n, a(n) for n=1..8. EXAMPLE 1170 belongs to this sequence because the digits 1, 7 and 0 appear 1170 times in total in the decimal representation of 1170!. 0! = 1, which contains no zeros, so 0 is a term. PROG (Python) from math import factorial def in_a(n): ....f = str(factorial(n)) ....s = set(str(n)) ....return sum(f.count(d) for d in s)==n (Perl) use ntheory ":all"; sub is_a264688 { my \$n = shift; \$n == eval "factorial(\$n) =~ tr/[\$n]//"; } # Dana Jacobsen, Jan 03 2016 CROSSREFS Sequence in context: A065656 A185468 A209825 * A043432 A065703 A202487 Adjacent sequences: A264685 A264686 A264687 * A264689 A264690 A264691 KEYWORD nonn,base,more AUTHOR Christian Perfect, Jan 03 2016 STATUS approved

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Last modified April 15 17:01 EDT 2024. Contains 371693 sequences. (Running on oeis4.)