A050050 a(n) = a(n-1)+a(m), where m=n-1-2^p and 2^p= 4.

1, 2, 3, 4, 6, 7, 9, 12, 16, 17, 19, 22, 26, 32, 39, 48, 60, 61, 63, 66, 70, 76, 83, 92, 104, 120, 137, 156, 178, 204, 236, 275, 323, 324, 326, 329, 333, 339, 346, 355, 367, 383, 400, 419, 441, 467, 499, 538

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Links

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

Crossrefs

Cf. similar sequences with different initial conditions: A050026 (1,1,1), A050030 (1,1,2), A050034 (1,1,3), A050038 (1,1,4), A050042 (1,2,1), A050046 (1,2,2), A050054 (1,2,4), A050058 (1,3,1), A050062 (1,3,2), A050066 (1,3,3), A050070 (1,3,4).

Programs

Mathematica

Fold[Append[#1, #1[[-1]] + #1[[#2]]] &, {1, 2, 3}, Flatten@Table[k, {n, 5}, {k, 2^n}]] (* Ivan Neretin, Sep 08 2015 *)