Partial sums of A050494.

Terms

a(0) =1a(1) =11a(2) =63a(3) =255a(4) =825a(5) =2277a(6) =5577a(7) =12441a(8) =25740a(9) =50050a(10) =92378a(11) =163098a(12) =277134a(13) =455430a(14) =726750a(15) =1129854a(16) =1716099a(17) =2552517a(18) =3725425a(19) =5344625a(20) =7548255a(21) =10508355a(22) =14437215a(23) =19594575a(24) =26295750a(25) =34920756a(26) =45924516a(27) =59848228a(28) =77331980a(29) =99128700