A050067 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, 3, 6, 12, 15, 21, 36, 72, 75, 81, 96, 132, 207, 303, 510, 1020, 1023, 1029, 1044, 1080, 1155, 1251, 1458, 1968, 2991, 4035, 5190, 6648, 9639, 14829, 24468, 48936, 48939, 48945, 48960, 48996, 49071, 49167, 49374, 49884

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, 3}, Flatten@Table[2 k, {n, 5}, {k, 2^n}]] (* Ivan Neretin, Sep 07 2015 *)

Crossrefs

Cf. A050027, A050031, A050035, A050039, A050043, A050047, A050051, A050055, A050059, A050063, A050071 (similar, but with different initial conditions).

Sequence in context: A250301 A261954 A112434 * A309399 A046875 A056494

Adjacent sequences: A050064 A050065 A050066 * A050068 A050069 A050070

Keyword

nonn

Author

Clark Kimberling

Status

approved