Indices of hexagonal numbers (A000384) which are also centered heptagonal numbers (A069099).
A253714
Indices of hexagonal numbers (A000384) which are also centered heptagonal numbers (A069099).
Terms
- a(0) =1a(1) =2857a(2) =45529a(3) =184300369a(4) =2937241777
External references
- oeis: A253714