100560

Appears in sequences

• Positive numbers k such that k and 6*k are anagrams in base 7 (written in base 7).at n=6A023072
• E.g.f. satisfies: A(x) = Sum_{n>=0} x^n * cosh(n^2*x).at n=6A217017
• Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted first by check digit, then lexicographically.at n=6A249855
• Irregular table read by rows: T(n,k) is the number of k-gons, k>=3, formed in a square with edge length 1 by straight line segments when connecting the internal edge points that divide the sides into segments with lengths equal to the Farey series of order n to the equivalent points on the opposite side of the square.at n=34A359656