Centered heptagonal numbers (A069099) which are also centered octagonal numbers (A016754).
A253514
Centered heptagonal numbers (A069099) which are also centered octagonal numbers (A016754).
Terms
- a(0) =1a(1) =841a(2) =755161a(3) =678133681a(4) =608963290321
External references
- oeis: A253514