171717

Appears in sequences

• Numbers n such that the cyclotomic polynomial of order n has a nonzero coefficient which does not appear in any cyclotomic polynomials of lower order.at n=21A046887
• Numbers whose consecutive digits differ by 6.at n=38A048408
• Triplets: base 10 representation is the juxtaposition of three identical strings.at n=16A074842
• a(n) = 17*((100^(n+1) - 1)/99).at n=2A156675
• Indices of records in heights of cyclotomic polynomials (A160338).at n=15A160340
• Number of pairs of intersecting diagonals in the interior and exterior of a regular n-gon.at n=34A211380
• Number of intersections of diagonals in the interior and exterior of a regular n-gon.at n=34A211383
• List of words over {1,7} with equal numbers of 1's and 7's.at n=13A214530