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 A190608 a(1)=a(2)=1; thereafter a(n) = 2*(a(ceiling(n/2))-a(floor(n/2))). 2
 1, 1, 0, 0, -2, 0, 0, 0, -4, 0, 4, 0, 0, 0, 0, 0, -8, 0, 8, 0, 8, 0, -8, 0, 0, 0, 0, 0, 0, 0, 0, 0, -16, 0, 16, 0, 16, 0, -16, 0, 16, 0, -16, 0, -16, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -32, 0, 32, 0, 32, 0, -32, 0, 32, 0, -32, 0, -32, 0, 32, 0, 32, 0, -32, 0, -32, 0, 32, 0, -32, 0, 32, 0, 32 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS MAPLE f:=proc(n) option remember; local r; r:=2; if n <= 2 then 1 else r*(f(ceil(n/2))-f(floor(n/2))); fi; end; CROSSREFS Cf. A190609, A190610. Sequence in context: A348616 A348613 A285182 * A011991 A234931 A129183 Adjacent sequences: A190605 A190606 A190607 * A190609 A190610 A190611 KEYWORD sign AUTHOR N. J. A. Sloane, May 13 2011, based on a posting by Benoit CLOITRE to the Sequence Fans Mailing List, Apr 29 2011 STATUS approved

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Last modified March 26 04:58 EDT 2023. Contains 361529 sequences. (Running on oeis4.)