a(n) = A194588(n) - A005043(n); complementary Riordan numbers.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =11a(6) =34a(7) =92a(8) =265a(9) =751a(10) =2156a(11) =6194a(12) =17874a(13) =51702a(14) =149941a(15) =435749a(16) =1268761a(17) =3700391a(18) =10808548a(19) =31613474a(20) =92577784a(21) =271407896a(22) =796484503a(23) =2339561795a(24) =6877992334a(25) =20236257626a(26) =59581937299a(27) =175546527727a(28) =517538571125