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 A102393 A wicked evil sequence. 11
 1, 0, 0, 4, 0, 6, 7, 0, 0, 10, 11, 0, 13, 0, 0, 16, 0, 18, 19, 0, 21, 0, 0, 24, 25, 0, 0, 28, 0, 30, 31, 0, 0, 34, 35, 0, 37, 0, 0, 40, 41, 0, 0, 44, 0, 46, 47, 0, 49, 0, 0, 52, 0, 54, 55, 0, 0, 58, 59, 0, 61, 0, 0, 64, 0, 66, 67, 0, 69, 0, 0, 72, 73, 0, 0, 76, 0, 78, 79, 0, 81, 0, 0, 84, 0, 86 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Elements of A026147 (evil numbers plus one) appear at positions indexed by the evil numbers A001969, 0 otherwise. A000027(n)=A102393(n)+A102394(n). The following sequences all appear to have the same parity: A003071, A029886, A061297, A092524, A093431, A102393, A104258, A122248, A128975. - Jeremy Gardiner, Dec 28 2008 LINKS Tanya Khovanova, There are no coincidences, arXiv preprint 1410.2193, 2014 FORMULA a(n)=(n+1)(1+(-1)^A000120(n))/2; a(n)=(n+1)(1+(-1)^A010060(n))/2. CROSSREFS Cf. A102391. Sequence in context: A019629 A073759 A066760 * A228131 A019833 A155743 Adjacent sequences:  A102390 A102391 A102392 * A102394 A102395 A102396 KEYWORD easy,nonn AUTHOR Paul Barry, Jan 06 2005 STATUS approved

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