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 A274716 a(2*n+1) = a(2*floor(n/2)+1) + n, a(2*n) = a(n), for n>=1 with a(1)=0. 3
 0, 0, 1, 0, 3, 1, 4, 0, 7, 3, 8, 1, 10, 4, 11, 0, 15, 7, 16, 3, 18, 8, 19, 1, 22, 10, 23, 4, 25, 11, 26, 0, 31, 15, 32, 7, 34, 16, 35, 3, 38, 18, 39, 8, 41, 19, 42, 1, 46, 22, 47, 10, 49, 23, 50, 4, 53, 25, 54, 11, 56, 26, 57, 0, 63, 31, 64, 15, 66, 32, 67, 7, 70, 34, 71, 16, 73, 35, 74, 3, 78, 38, 79, 18, 81, 39, 82, 8, 85, 41, 86, 19, 88, 42, 89, 1, 94, 46, 95, 22, 97, 47, 98, 10, 101, 49, 102, 23, 104, 50, 105, 4, 109, 53, 110, 25, 112, 54, 113, 11, 116, 56, 117, 26, 119, 57, 120, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS The values {2^a(n)} form the denominators of the coefficients in the g.f. of A274717, which satisfies G(x) = G(x^2) + sqrt( G(x^2) ). LINKS Table of n, a(n) for n=1..128. FORMULA a(2^n) = 0 for n>=0. a(2*n-1) = A005187(n-1) for n>=1. PROG (PARI) {a(n) = if(n==1, 0, if(n%2==0, a(n/2), a(2*(n\4)+1) + n\2 ) )} for(n=1, 32, print1(a(n), ", ")) CROSSREFS Cf. A274717, A005187. Sequence in context: A076816 A021765 A267187 * A245434 A305100 A051512 Adjacent sequences: A274713 A274714 A274715 * A274717 A274718 A274719 KEYWORD nonn AUTHOR Paul D. Hanna, Jul 07 2016 STATUS approved

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Last modified September 16 04:06 EDT 2024. Contains 375959 sequences. (Running on oeis4.)