a(n) = -2^n*(E(n, 1/2) + E(n, 1) + (n mod 2)*2*(E(n+1, 1/2) + E(n+1, 1))), where E(n, x) are the Euler polynomials.
A240559
a(n) = -2^n*(E(n, 1/2) + E(n, 1) + (n mod 2)*2*(E(n+1, 1/2) + E(n+1, 1))), where E(n, x) are the Euler polynomials.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =-3a(4) =-5a(5) =45a(6) =61a(7) =-1113a(8) =-1385a(9) =42585a(10) =50521a(11) =-2348973a(12) =-2702765a(13) =176992725a(14) =199360981a(15) =-17487754833a(16) =-19391512145
External references
- oeis: A240559