Expansion of e.g.f. (1 + tan(x))/(1 - tan(x)).
A000831
Expansion of e.g.f. (1 + tan(x))/(1 - tan(x)).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =16a(4) =80a(5) =512a(6) =3904a(7) =34816a(8) =354560a(9) =4063232a(10) =51733504a(11) =724566016a(12) =11070525440a(13) =183240753152
External references
- oeis: A000831