OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..8193
MAPLE
a := proc(n) option remember;
`if`(n < 4, [1, 3, 3][n], a(n - 1) + a(-2^ceil(-1+log[2](n - 1)) + n - 1)):
end proc:
seq(a(n), n = 1..40); #
MATHEMATICA
Fold[Append[#1, #1[[-1]] + #1[[#2]]] &, {1, 3, 3}, Flatten@Table[k, {n, 5}, {k, 2^n}]] (* Ivan Neretin, Sep 08 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Name edited by Petros Hadjicostas, Nov 18 2019
STATUS
approved