A050059 - OEIS

A050059

a(n)=a(n-1)+a(m), where m=2n-2-2^(p+1) and 2^p<n-1<=2^(p+1), for n >= 4.

1, 3, 1, 4, 8, 11, 15, 26, 52, 55, 59, 70, 96, 151, 221, 372, 744, 747, 751, 762, 788, 843, 913, 1064, 1436, 2183, 2945, 3788, 4852, 7035, 10823, 17858, 35716, 35719, 35723, 35734, 35760, 35815, 35885, 36036, 36408, 37155, 37917

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OFFSET

1,2

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..8193

MATHEMATICA

Fold[Append[#1, #1[[-1]] + #1[[#2]]] &, {1, 3, 1}, Flatten@Table[2 k, {n, 5}, {k, 2^n}]] (* Ivan Neretin, Sep 07 2015 *)

CROSSREFS

Cf. A050027, A050031, A050035, A050039, A050043, A050047, A050051, A050055, A050063, A050067, A050071 (similar, but with different initial conditions).

Sequence in context: A057049 A245672 A303029 * A025121 A025097 A122115

Adjacent sequences: A050056 A050057 A050058 * A050060 A050061 A050062

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved