Number of unsensed genus 1 maps with n edges.

Terms

a(0) =0a(1) =0a(2) =1a(3) =6a(4) =40a(5) =320a(6) =2946a(7) =29364a(8) =309558a(9) =3365108a(10) =37246245a(11) =416751008a(12) =4696232371a(13) =53186743416a(14) =604690121555