Number of twice-partitions of type (Q,P,Q) and weight n.

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =5a(5) =11a(6) =12a(7) =18a(8) =24a(9) =49a(10) =53a(11) =82a(12) =102a(13) =149a(14) =236a(15) =297a(16) =392a(17) =540a(18) =702a(19) =924a(20) =1423a(21) =1723a(22) =2318a(23) =3016a(24) =3969a(25) =5037a(26) =6647a(27) =9285a(28) =11448a(29) =15048