Index of A190874 at record terms.

Terms

a(0) =1a(1) =9a(2) =18a(3) =42a(4) =165a(5) =317a(6) =559a(7) =634a(8) =2604a(9) =7421a(10) =9401a(11) =20760a(12) =86376a(13) =178008a(14) =3549196a(15) =3840921a(16) =5633768a(17) =16454380a(18) =28751054