Duplicate of A088463.

Terms

a(0) =31a(1) =61a(2) =181a(3) =283a(4) =811a(5) =1279a(6) =1999a(7) =2551a(8) =3931a(9) =4159a(10) =5659a(11) =6553a(12) =8389a(13) =9241a(14) =9463