p-INVERT of the squares (A000290), where p(S) = (1 - S)^2.

Terms

a(0) =2a(1) =11a(2) =46a(3) =187a(4) =748a(5) =2948a(6) =11480a(7) =44273a(8) =169374a(9) =643601a(10) =2431526a(11) =9140616a(12) =34212350a(13) =127563959a(14) =474022478a(15) =1756118055a(16) =6488228880a(17) =23912815820a(18) =87935847700a(19) =322713694333