G.f.: A(x) = R_2(x)/R_1(x), where R_2(x) and R_1(x) are the g.f.s of row 2 (A124542) and row 1 (A124531), respectively, of table A124540.
A124541
G.f.: A(x) = R_2(x)/R_1(x), where R_2(x) and R_1(x) are the g.f.s of row 2 (A124542) and row 1 (A124531), respectively, of table A124540.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =15a(4) =63a(5) =295a(6) =1502a(7) =8167a(8) =46873a(9) =281672a(10) =1761798a(11) =11418480a(12) =76415644a(13) =526594846a(14) =3728435747a(15) =27073765165a(16) =201325681384
External references
- oeis: A124541