Fifth column of triangle A115193 (called C(1,2)).
A115202
Fifth column of triangle A115193 (called C(1,2)).
Terms
- a(0) =1a(1) =9a(2) =67a(3) =477a(4) =3363a(5) =23741a(6) =168451a(7) =1202685a(8) =8641539a(9) =62470141a(10) =454164483a(11) =3319054333a(12) =24371503107a(13) =179736723453
External references
- oeis: A115202