Triangular numbers that are half other triangular numbers.

A075528

Triangular numbers that are half other triangular numbers.

Terms

    a(0) =0a(1) =3a(2) =105a(3) =3570a(4) =121278a(5) =4119885a(6) =139954815a(7) =4754343828a(8) =161507735340

External references