Square triangular numbers: numbers that are both triangular and square.

A001110

Square triangular numbers: numbers that are both triangular and square.

Terms

    a(0) =0a(1) =1a(2) =36a(3) =1225a(4) =41616a(5) =1413721a(6) =48024900a(7) =1631432881a(8) =55420693056

External references