Partial sums of A048696.

Terms

a(0) =1a(1) =10a(2) =29a(3) =76a(4) =189a(5) =462a(6) =1121a(7) =2712a(8) =6553a(9) =15826a(10) =38213a(11) =92260a(12) =222741a(13) =537750a(14) =1298249a(15) =3134256a(16) =7566769a(17) =18267802a(18) =44102381a(19) =106472572a(20) =257047533a(21) =620567646a(22) =1498182833