Numbers k such that 13k = 6j^2 + 6j + 1.

Terms

a(0) =1a(1) =61a(2) =97a(3) =277a(4) =349a(5) =649a(6) =757a(7) =1177a(8) =1321a(9) =1861a(10) =2041a(11) =2701a(12) =2917a(13) =3697a(14) =3949a(15) =4849a(16) =5137a(17) =6157a(18) =6481a(19) =7621a(20) =7981a(21) =9241a(22) =9637a(23) =11017a(24) =11449a(25) =12949a(26) =13417a(27) =15037a(28) =15541a(29) =17281