A137576((k-1)/2) for composite numbers k from A141229.

Terms

a(0) =55a(1) =301a(2) =3631a(3) =6085a(4) =19495a(5) =70645a(6) =147853a(7) =438205a(8) =605695a(9) =669781a(10) =888823a(11) =1694695a(12) =3060301a(13) =3640783a(14) =6692791a(15) =7998895a(16) =9857245a(17) =12912535a(18) =15443365a(19) =17109895a(20) =17690941a(21) =22819693a(22) =28048231a(23) =34936663a(24) =58178245a(25) =75203725a(26) =95263573a(27) =124984543a(28) =127160245a(29) =155267965