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

Terms

a(0) =0a(1) =3a(2) =10a(3) =36a(4) =99a(5) =254a(6) =598a(7) =1339a(8) =2872a(9) =5966a(10) =12071a(11) =23908a(12) =46516a(13) =89155a(14) =168702a(15) =315712a(16) =585163a(17) =1075442a(18) =1961754a(19) =3554715a(20) =6402780a(21) =11470778a(22) =20450255a(23) =36297576a(24) =64164744a(25) =113006019a(26) =198345298a(27) =347033724a(28) =605414067a(29) =1053307526