1-sequence of reduction of (3n-1) by x^2 -> x+1.

Terms

a(0) =0a(1) =5a(2) =13a(3) =35a(4) =77a(5) =162a(6) =322a(7) =621a(8) =1167a(9) =2153a(10) =3913a(11) =7028a(12) =12500a(13) =22053a(14) =38641a(15) =67311a(16) =116661a(17) =201302a(18) =346006a(19) =592685a(20) =1012115a(21) =1723605a(22) =2927953a(23) =4962600a(24) =8393832a(25) =14170757a(26) =23882197a(27) =40184891a(28) =67516637a(29) =113283018