A074706 1/(1+Sum_{n>0} (-x)^n/n^2) = Sum_{n>=0} a(n)*x^n/n!^2.
1, 1, 3, 22, 272, 5476, 153172, 6027960, 300059328, 19521660672, 1516955215104, 147672608429952, 16485184277455104, 2248301164177656576, 340306578491544509184, 62081853548770370612736
Offset: 0