Numbers n such that T(n) + T(n+1) + ... + T(n+12) is a square, where T = A000217 (triangular numbers).

A257293

Numbers n such that T(n) + T(n+1) + ... + T(n+12) is a square, where T = A000217 (triangular numbers).

Terms

    a(0) =3a(1) =29a(2) =75a(3) =432a(4) =998a(5) =3624a(6) =8310a(7) =44717a(8) =102443a(9) =370269a(10) =848195a(11) =4561352a(12) =10448838a(13) =37764464a(14) =86508230a(15) =465213837a(16) =1065679683a(17) =3851605709a(18) =8822991915a(19) =47447250672a(20) =108688879478a(21) =392826018504a(22) =899858667750

External references