Column 3 of triangle A104980, omitting leading zeros.
A104982
Column 3 of triangle A104980, omitting leading zeros.
Terms
- a(0) =1a(1) =4a(2) =21a(3) =133a(4) =977a(5) =8135a(6) =75609a(7) =775667a(8) =8707057a(9) =106185715a(10) =1398451353a(11) =19786121467a(12) =299384925569
External references
- oeis: A104982