OFFSET
0,3
FORMULA
a(n) = |[n]_{1+i}!|^2.
a(n+1)/a(n) = 4*A038505(n) + 1.
MATHEMATICA
Table[QFactorial[n, 1 + I] QFactorial[n, 1 - I], {n, 0, 20}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Reshetnikov, Sep 16 2016
STATUS
approved