Triangular array read by rows, giving coefficients of P(n,X) = Product_{i=1..2n+1} (X - 1/cos(Pi*k/(2n+1))), a polynomial with integer coefficients.
A075613
Triangular array read by rows, giving coefficients of P(n,X) = Product_{i=1..2n+1} (X - 1/cos(Pi*k/(2n+1))), a polynomial with integer coefficients.
Terms
- a(0) =1a(1) =1a(2) =-4a(3) =-4a(4) =1a(5) =1a(6) =-12a(7) =-12a(8) =16a(9) =16a(10) =1a(11) =1a(12) =-24a(13) =-24a(14) =80a(15) =80a(16) =-64a(17) =-64a(18) =1a(19) =1a(20) =-40a(21) =-40a(22) =240a(23) =240a(24) =-448a(25) =-448a(26) =256a(27) =256a(28) =1a(29) =1
External references
- oeis: A075613