Stirling numbers of the second kind S(n+4, n).

Terms

a(0) =0a(1) =1a(2) =31a(3) =301a(4) =1701a(5) =6951a(6) =22827a(7) =63987a(8) =159027a(9) =359502a(10) =752752a(11) =1479478a(12) =2757118a(13) =4910178a(14) =8408778a(15) =13916778a(16) =22350954a(17) =34952799a(18) =53374629a(19) =79781779a(20) =116972779a(21) =168519505a(22) =238929405a(23) =333832005a(24) =460192005a(25) =626551380a(26) =843303006a(27) =1122998436a(28) =1480692556