The sequence T_{3,1}(n,3).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =7a(5) =20a(6) =51a(7) =121a(8) =290a(9) =711a(10) =1747a(11) =4268a(12) =10407a(13) =25405a(14) =62066a(15) =151611a(16) =370255a(17) =904196a(18) =2208267a(19) =5393233a(20) =13171682a(21) =32168415a(22) =78563131a(23) =191870876a(24) =468596895a(25) =1144430581a(26) =2794984562a(27) =6826049523a(28) =16670917207a(29) =40714541300