Indices of centered square numbers (A001844) which are also centered heptagonal numbers (A069099).

A253459

Indices of centered square numbers (A001844) which are also centered heptagonal numbers (A069099).

Terms

    a(0) =1a(1) =21a(2) =148a(3) =5208a(4) =37465a(5) =1322685a(6) =9515836a(7) =335956656a(8) =2416984753a(9) =85331667813a(10) =613904611300

External references