Seventh column of A046741.

Terms

a(0) =13a(1) =223a(2) =1577a(3) =7018a(4) =23431a(5) =64316a(6) =153190a(7) =327718a(8) =644573a(9) =1185025a(10) =2061259a(11) =3423422a(12) =5467399a(13) =8443318a(14) =12664784a(15) =18518842a(16) =26476669a(17) =37104995a(18) =51078253a(19) =69191458a(20) =92373815a(21) =121703056a(22) =158420506a(23) =203946878a(24) =259898797a(25) =328106053