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

Terms

a(0) =2a(1) =2a(2) =10a(3) =21a(4) =49a(5) =100a(6) =200a(7) =384a(8) =722a(9) =1331a(10) =2419a(11) =4344a(12) =7726a(13) =13630a(14) =23882a(15) =41601a(16) =72101a(17) =124412a(18) =213844a(19) =366300a(20) =625522a(21) =1065247a(22) =1809575a(23) =3067056a(24) =5187674a(25) =8758010a(26) =14760010a(27) =24835629a(28) =41727577a(29) =70012756