Inverse Euler transform of 2 - A195981.

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =2a(5) =6a(6) =15a(7) =40a(8) =110a(9) =303a(10) =853a(11) =2419a(12) =6950a(13) =20110a(14) =58677a(15) =172267a(16) =508825a(17) =1510472a(18) =4504978a(19) =13491155a(20) =40554394a(21) =122318519a(22) =370075767a(23) =1122830663a(24) =3415591776a(25) =10414918850a(26) =31827804005a(27) =97464863424a(28) =299032201886a(29) =919094334980