3rd binomial transform of (1,2,0,0,0,0,0,0,...).

Terms

a(0) =1a(1) =5a(2) =21a(3) =81a(4) =297a(5) =1053a(6) =3645a(7) =12393a(8) =41553a(9) =137781a(10) =452709a(11) =1476225a(12) =4782969a(13) =15411789a(14) =49424013a(15) =157837977a(16) =502211745a(17) =1592728677a(18) =5036466357a(19) =15884240049a(20) =49977243081a(21) =156905298045a(22) =491636600541