a(n) = A275706(n)^2 + A276688(n)^2 = [n]_{1+i}! * [n]_{1-i}!, where [n]_q! is the q-factorial, i = sqrt(-1).

A276755

a(n) = A275706(n)^2 + A276688(n)^2 = [n]_{1+i}! * [n]_{1-i}!, where [n]_q! is the q-factorial, i = sqrt(-1).

Terms

    a(0) =1a(1) =1a(2) =5a(3) =65a(4) =1625a(5) =66625a(6) =4330625a(7) =489360625a(8) =110106140625

External references