85169

Appears in sequences

• T(n,n+1), array T as in A047060.at n=10A047066
• Number of pairings of the first 2n positive integers so that the absolute differences of each pair are different.at n=8A060963
• Composite numbers whose exponents in their canonical factorization lie in the geometric progression 1, 3, 9, ...at n=32A102838
• a(n) = 7*n^3.at n=23A244727
• Least positive integer b such that (n, b, n+b) is an abc-hit.at n=14A272236
• Least positive integer b such that b > n and (n, b, n+b) is an abc-hit.at n=14A272239
• Numbers c such that a + b + c = d are abcd quadruples in the "abcd-conjecture" with a < b < c < d, all |a|, b, c, d are pairwise coprime, the quality q of the quadruple has q > 1, term a = +/- 1 = A376149(n) and term b = A376144(n) (with repetitions and sorted by c then b).at n=20A376143
• a(n) is the (n-1)-st frugal number in base n.at n=40A379539