Partial sums of A053295.

Terms

a(0) =1a(1) =8a(2) =37a(3) =129a(4) =376a(5) =967a(6) =2267a(7) =4950a(8) =10220a(9) =20175a(10) =38403a(11) =70954a(12) =127921a(13) =226007a(14) =392688a(15) =672959a(16) =1140260a(17) =1914166a(18) =3189022a(19) =5280288a(20) =8699540a(21) =14275838a(22) =23352118a(23) =38102976a(24) =62048869a(25) =100888126a(26) =163843187a(27) =265838881a(28) =431026972a(29) =698489013