Indices of hexagonal numbers (A000384) which are also centered triangular numbers (A005448).

A254283

Indices of hexagonal numbers (A000384) which are also centered triangular numbers (A005448).

Terms

    a(0) =1a(1) =31a(2) =115a(3) =5965a(4) =22261a(5) =1157131a(6) =4318471a(7) =224477401a(8) =837761065a(9) =43547458615a(10) =162521328091

External references