p-INVERT of the positive integers, where p(S) = 1 - 7*S^2.

Terms

a(0) =0a(1) =7a(2) =28a(3) =119a(4) =532a(5) =2352a(6) =10388a(7) =45913a(8) =202916a(9) =896777a(10) =3963288a(11) =17515680a(12) =77410200a(13) =342112855a(14) =1511961052a(15) =6682082183a(16) =29531331004a(17) =130513137552a(18) =576800248892