Denominator of 2*n*A000111(n-1)/A000111(n): approximations of Pi using Euler (up/down) numbers.
A132050
Denominator of 2*n*A000111(n-1)/A000111(n): approximations of Pi using Euler (up/down) numbers.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =8a(5) =61a(6) =136a(7) =1385a(8) =3968a(9) =50521a(10) =176896a(11) =2702765a(12) =260096a(13) =199360981a(14) =951878656a(15) =19391512145a(16) =104932671488
External references
- oeis: A132050