T(n+5,5) with T as in A036355.

Terms

a(0) =8a(1) =38a(2) =149a(3) =478a(4) =1390a(5) =3736a(6) =9496a(7) =23080a(8) =54127a(9) =123230a(10) =273653a(11) =594878a(12) =1269532a(13) =2665912a(14) =5518900a(15) =11280856a(16) =22797331a(17) =45599656a(18) =90362560a(19) =177550600a(20) =346157050a(21) =670060100a(22) =1288497590a(23) =2462607020a(24) =4679908400a(25) =8846662634