a(n) = binomial(n+7,n)*binomial(n+11,n).

Terms

a(0) =1a(1) =96a(2) =2808a(3) =43680a(4) =450450a(5) =3459456a(6) =21237216a(7) =109219968a(8) =486370170a(9) =1921462400a(10) =6859620768a(11) =22449667968a(12) =68128506264a(13) =193501082880a(14) =518306472000