Third binomial transform of binomial(n+3, 3).

Terms

a(0) =1a(1) =7a(2) =43a(3) =245a(4) =1328a(5) =6944a(6) =35328a(7) =175872a(8) =860160a(9) =4145152a(10) =19726336a(11) =92864512a(12) =433061888a(13) =2002780160a(14) =9193914368a(15) =41926262784a(16) =190052302848a(17) =856845975552