Expansion of (1+x)^2/(1-18*x+x^2).
A004292
Expansion of (1+x)^2/(1-18*x+x^2).
Terms
- a(0) =1a(1) =20a(2) =360a(3) =6460a(4) =115920a(5) =2080100a(6) =37325880a(7) =669785740a(8) =12018817440a(9) =215668928180
External references
- oeis: A004292
A004292
Expansion of (1+x)^2/(1-18*x+x^2).