a(n) = 143*(n+1)*binomial(n+4,13)/2.

Terms

a(0) =715a(1) =11011a(2) =90090a(3) =520520a(4) =2382380a(5) =9189180a(6) =31039008a(7) =94225560a(8) =261891630a(9) =675745070a(10) =1636014380a(11) =3747960216a(12) =8180071900a(13) =17103786700a(14) =34420042800a(15) =66927861000a(16) =126159017985a(17) =231196390425a(18) =412918656150a(19) =720279159600