Generalized Stirling numbers, [n+3,n]_2.

Terms

a(0) =1a(1) =24a(2) =154a(3) =580a(4) =1665a(5) =4025a(6) =8624a(7) =16884a(8) =30810a(9) =53130a(10) =87450a(11) =138424a(12) =211939a(13) =315315a(14) =457520a(15) =649400a(16) =903924a(17) =1236444a(18) =1664970a(19) =2210460a(20) =2897125a(21) =3752749a(22) =4809024a(23) =6101900a(24) =7671950a(25) =9564750a(26) =11831274a(27) =14528304a(28) =17718855a(29) =21472615