Number of different nonnegative solutions of equation: x^2 - y^2 = k! for 1 <= k <= n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =7a(5) =16a(6) =34a(7) =70a(8) =130a(9) =235a(10) =445a(11) =769a(12) =1417a(13) =2497a(14) =4177a(15) =6529a(16) =11233a(17) =17713a(18) =30673a(19) =49033a(20) =76233a(21) =119433a(22) =205833a(23) =316713a(24) =471945a(25) =715881a(26) =1026345a(27) =1449705a(28) =2296425a(29) =3376425