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 A102391 Evil numbers in evil places. 3
 0, 0, 0, 3, 0, 5, 6, 0, 0, 9, 10, 0, 12, 0, 0, 15, 0, 17, 18, 0, 20, 0, 0, 23, 24, 0, 0, 27, 0, 29, 30, 0, 0, 33, 34, 0, 36, 0, 0, 39, 40, 0, 0, 43, 0, 45, 46, 0, 48, 0, 0, 51, 0, 53, 54, 0, 0, 57, 58, 0, 60, 0, 0, 63, 0, 65, 66, 0, 68, 0, 0, 71, 72, 0, 0, 75, 0, 77, 78, 0, 80, 0, 0, 83, 0, 85 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Evil numbers A001969(n) appear at positions indexed by the evil numbers, 0 otherwise. A001477(n)=A102391(n)+A102392(n). LINKS FORMULA a(n)=if((1+floor(n/2))(1+(-1)^A000120(n))/2=0, 0, n); a(n)=if((1+floor(n/2))(1+(-1)^A010060(n))/2=0, 0, n). CROSSREFS Sequence in context: A197690 A181840 A198432 * A038556 A193508 A052483 Adjacent sequences:  A102388 A102389 A102390 * A102392 A102393 A102394 KEYWORD easy,nonn AUTHOR Paul Barry, Jan 06 2005 STATUS approved

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