71065

Appears in sequences

• Indices of heptagonal numbers (A000566) which are also triangular numbers (A000217).at n=4A046193
• Indices of heptagonal numbers (A000566) which are also hexagonal.at n=2A048902
• Numbers n such that the smallest possible number of multiplications required to compute x^n is by 2 less than the number of multiplications obtained by Knuth's power tree method.at n=13A115614
• Number of ways to reciprocally link elements of an 2 X n array either to themselves or to exactly two horizontal, diagonal and antidiagonal neighbors, without consecutive collinear links.at n=12A220739
• Centered square numbers which are sphenic numbers.at n=25A380882