a(0) = 1 and a(n) = A309807(n) - A309807(n-1) for n > 0.

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =3a(6) =3a(7) =10a(8) =11a(9) =30a(10) =48a(11) =114a(12) =166a(13) =486a(14) =727a(15) =1643a(16) =3193a(17) =7619a(18) =12489a(19) =30781a(20) =52007a(21) =123418a(22) =248386a(23) =520902a(24) =909701a(25) =2349536a(26) =4417148a(27) =9055904a(28) =18451951a(29) =41215779