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A238989
Numbers that are not odiousfree*evilfree. The complement of A237417.
1
1, 2, 4, 7, 8, 11, 13, 14, 16, 19, 22, 25, 26, 28, 31, 32, 37, 38, 41, 44, 47, 49, 50, 52, 56, 59, 61, 62, 64, 67, 69, 73, 74, 75, 76, 77, 79, 81, 82, 87, 88, 91, 94, 97, 98, 100, 103, 104, 107, 109, 112, 115, 118, 121, 122, 124, 125, 127, 128
OFFSET
1,2
LINKS
MATHEMATICA
odFreeQ[n_] := AllTrue[Rest @ Divisors[n], EvenQ[DigitCount[#, 2, 1]] &]; evFreeQ[n_] := AllTrue[Divisors[n], OddQ[DigitCount[#, 2, 1]] &]; m = 100; o = Select[Range[2, m], odFreeQ]; e = Select[Range[m], evFreeQ]; Complement[Range[m], Union @ Select[Times @@@ Tuples[{o, e}], # <= m &]] (* Amiram Eldar, Oct 16 2020 *)
CROSSREFS
Cf. A000069 (odious numbers), A001969 (evil numbers), A093688 (1 together with odiousfree numbers), A093696 (evilfree numbers), A237417 (odiousfree*evilfree numbers).
Sequence in context: A080308 A089559 A165741 * A093696 A190851 A325427
KEYWORD
nonn,base
AUTHOR
Irina Gerasimova, Mar 08 2014, following a suggestion from Juri-Stepan Gerasimov.
STATUS
approved