p-INVERT of (-1 + 2^n), where p(S) = 1 - S - S^2.

Terms

a(0) =1a(1) =5a(2) =22a(3) =93a(4) =387a(5) =1602a(6) =6623a(7) =27377a(8) =113174a(9) =467877a(10) =1934315a(11) =7996978a(12) =33061703a(13) =136686153a(14) =565097958a(15) =2336269341a(16) =9658775347a(17) =39932014114a(18) =165089847535a(19) =682526498529