Numbers k such that 30 plus the k-th triangular number is a perfect square.

A154154

Numbers k such that 30 plus the k-th triangular number is a perfect square.

Terms

    a(0) =3a(1) =13a(2) =34a(3) =84a(4) =203a(5) =493a(6) =1186a(7) =2876a(8) =6915a(9) =16765a(10) =40306a(11) =97716a(12) =234923a(13) =569533a(14) =1369234a(15) =3319484a(16) =7980483a(17) =19347373a(18) =46513666

External references