Coefficients of a Bessel function (reciprocal of J_0(z)); also pairs of permutations with rise/rise forbidden.

A000275

Coefficients of a Bessel function (reciprocal of J_0(z)); also pairs of permutations with rise/rise forbidden.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =19a(4) =211a(5) =3651a(6) =90921a(7) =3081513a(8) =136407699a(9) =7642177651a(10) =528579161353

External references