a(n)=T(n,n+2), array T as in A049735.

Terms

a(0) =13a(1) =37a(2) =69a(3) =109a(4) =169a(5) =241a(6) =317a(7) =421a(8) =517a(9) =641a(10) =769a(11) =917a(12) =1085a(13) =1237a(14) =1433a(15) =1617a(16) =1829a(17) =2053a(18) =2261a(19) =2537a(20) =2785a(21) =3061a(22) =3333a(23) =3613a(24) =3945a(25) =4257a(26) =4597a(27) =4941a(28) =5281a(29) =5673