Cogrowth sequence of the 20-element dicyclic group Dic20 = <S,T | S^5, T^4, STST^3>.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =6a(7) =7a(8) =19a(9) =9a(10) =61a(11) =88a(12) =226a(13) =377a(14) =945a(15) =1473a(16) =3427a(17) =6154a(18) =13758a(19) =25327a(20) =53967a(21) =102865a(22) =213345a(23) =411700a(24) =849706a(25) =1661885a(26) =3382821a(27) =6668577a(28) =13493719a(29) =26725414