Numerator of 2*n*A000111(n-1)/A000111(n): approximations of Pi, using Euler (up/down) numbers.
A132049
Numerator of 2*n*A000111(n-1)/A000111(n): approximations of Pi, using Euler (up/down) numbers.
Terms
- a(0) =2a(1) =4a(2) =3a(3) =16a(4) =25a(5) =192a(6) =427a(7) =4352a(8) =12465a(9) =158720a(10) =555731a(11) =8491008a(12) =817115a(13) =626311168a(14) =2990414715a(15) =60920233984a(16) =329655706465
External references
- oeis: A132049