A113835 a(n) = a(n-1) + 2^(A007494(n-1)).

1, 5, 13, 45, 109, 365, 877, 2925, 7021, 23405, 56173, 187245, 449389, 1497965, 3595117, 11983725, 28760941, 95869805, 230087533, 766958445, 1840700269, 6135667565, 14725602157, 49085340525, 117804817261, 392682724205

Offset

1,2

Links

Table of n, a(n) for n=1..26.

Formula

Empirical g.f.: x*(4*x+1) / ((x-1)*(8*x^2-1)). - Colin Barker, Sep 01 2013

Crossrefs

Cf. A099974, A112627, A080355, A080567, A099969, A099970, A099971.

Partial sums of A094015.

Sequence in context: A115785 A218926 A360798 * A006349 A322203 A052899

Adjacent sequences: A113832 A113833 A113834 * A113836 A113837 A113838

Keyword

nonn

Author

Artur Jasinski, Jan 27 2006

Extensions

Edited with better definition and offset corrected by Omar E. Pol, Jan 08 2009

Status

approved