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 A005128 Number of k for which n does not divide Stirling_2 subset numbers S(n, k). 1
 1, 0, 2, 2, 4, 2, 5, 2, 8, 7, 7, 2, 10, 2, 9, 10, 16, 2, 16, 2, 16, 11, 13, 2, 20, 15, 13, 22, 20, 2, 13, 2, 32, 14, 11, 20, 32, 2, 18, 18, 33, 2, 33, 2, 26, 31, 20, 2, 44, 28, 34, 20, 31, 2, 47, 23, 38, 19, 18, 2, 42, 2, 15, 37, 64, 29, 37, 2, 33, 22, 43, 2, 58, 2, 26, 57, 40, 42 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 MATHEMATICA Prepend[ Array[ Length[ Select[ Table[ StirlingS2[ #, k ]/#, {k, 0, #} ], !IntegerQ[ # ]& ] ]&, 100 ], 1 ] CROSSREFS Cf. A048993. Sequence in context: A057567 A217895 A328720 * A187782 A129296 A300837 Adjacent sequences:  A005125 A005126 A005127 * A005129 A005130 A005131 KEYWORD nonn AUTHOR STATUS approved

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Last modified August 14 04:13 EDT 2020. Contains 336477 sequences. (Running on oeis4.)