A255822 Number of nonzero terms in A117943 up to index 2^n: a(n) = Sum_{k=1..2^n} A117943(k).

0, 1, 1, 3, 5, 9, 19, 41, 84, 163, 311, 615, 1268, 2612, 5228, 10244, 20172, 40496, 82066, 165284, 329388, 654207, 1305709, 2620890, 5262399, 10524162, 20983533, 41878200, 83848212, 168188942, 337036806, 673896773, 1345770393, 2688442850, 5375471835

Offset

0,4

Comments

The sequence seems to grow roughly as a(n) ~ c*2^n with c = 0.313...

Links

Hiroaki Yamanouchi, Table of n, a(n) for n = 0..2000

Prog

(PARI) N=1; s=0; for(n=1, 9e9, s+=A117943(n); n<N&&next; print1(s", "); N*=2)

Crossrefs

Cf. A117943, A178931.

Sequence in context: A291398 A078066 A018002 * A227234 A192480 A107028

Adjacent sequences: A255819 A255820 A255821 * A255823 A255824 A255825

Keyword

nonn

Author

M. F. Hasler, Mar 09 2015

Extensions

a(25)-a(34) from Hiroaki Yamanouchi, Mar 10 2015

Status

approved