Numerators of rationals (in lowest terms) used in a certain high temperature expansion.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =7a(5) =3a(6) =33a(7) =143a(8) =143a(9) =221a(10) =4199a(11) =2261a(12) =7429a(13) =37145a(14) =334305a(15) =570285a(16) =1964315a(17) =3411705a(18) =23881935a(19) =42077695a(20) =149184555a(21) =265937685a(22) =3811773485a(23) =6861192273a(24) =24805848987a(25) =135054066707a(26) =327988447717a(27) =599427163069