An 8th-degree product form sequence: a(n)=Product[(1 + 4*Sin[k*Pi/n]^2 + 16*Sin[k*Pi/n]^4 + 64*Sin[k*Pi/n]^6 + 256*Sin[k*Pi/n]^8), {k, 1, Floor[(n - 1)/2]}].
A152144
An 8th-degree product form sequence: a(n)=Product[(1 + 4*Sin[k*Pi/n]^2 + 16*Sin[k*Pi/n]^4 + 64*Sin[k*Pi/n]^6 + 256*Sin[k*Pi/n]^8), {k, 1, Floor[(n - 1)/2]}].
Terms
- a(0) =1a(1) =1a(2) =1a(3) =121a(4) =31a(5) =2501a(6) =605a(7) =51941a(8) =13361a(9) =1176241a(10) =302621a(11) =26454781a(12) =6770555a(13) =590741581a(14) =151200251a(15) =13200630641a(16) =3380212751a(17) =295159215856a(18) =75579365455
External references
- oeis: A152144