Column 0 of triangle A135902; also equals column 2 of triangle A135902 (shift right).
A135903
Column 0 of triangle A135902; also equals column 2 of triangle A135902 (shift right).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =102a(5) =860a(6) =8548a(7) =97094a(8) =1234324a(9) =17302880a(10) =264503376a(11) =4371376170a(12) =77567318328
External references
- oeis: A135903