a(n) = denominator of the coefficient c(n) of x^n in (tan x)/Product_{k=1..n-1} 1 + c(k)*x^k, n = 1, 2, 3, ...
A170919
a(n) = denominator of the coefficient c(n) of x^n in (tan x)/Product_{k=1..n-1} 1 + c(k)*x^k, n = 1, 2, 3, ...
Terms
- a(0) =1a(1) =1a(2) =3a(3) =3a(4) =5a(5) =45a(6) =105a(7) =315a(8) =2835a(9) =14175a(10) =5775a(11) =467775a(12) =6081075a(13) =2837835a(14) =212837625a(15) =70945875a(16) =3618239625a(17) =97692469875a(18) =206239658625
External references
- oeis: A170919