Stirling numbers of second kind S(n,3).

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =6a(5) =25a(6) =90a(7) =301a(8) =966a(9) =3025a(10) =9330a(11) =28501a(12) =86526a(13) =261625a(14) =788970a(15) =2375101a(16) =7141686a(17) =21457825a(18) =64439010a(19) =193448101a(20) =580606446a(21) =1742343625a(22) =5228079450a(23) =15686335501a(24) =47063200806a(25) =141197991025a(26) =423610750290