Partial sums of A152896.

Terms

a(0) =0a(1) =3a(2) =18a(3) =73a(4) =256a(5) =844a(6) =2709a(7) =8596a(8) =27146a(9) =85560a(10) =269464a(11) =848400a(12) =2670859a(13) =8407805a(14) =26467163a(15) =83316232a(16) =262271397a(17) =825604226a(18) =2598919135a(19) =8181135469a(20) =25753388928a(21) =81069068693a(22) =255197243733a(23) =803335158081