26565

Appears in sequences

• Odd primitive abundant numbers.at n=36A006038
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=31A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=27A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=35A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=28A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=32A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=33A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=34A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=29A013594
• Smallest order of cyclotomic polynomial containing n or -n as a coefficient.at n=30A013594
• Take n equally spaced points on circle, connect them by a path with n-1 line segments; sequence gives number of distinct path lengths.at n=13A030077
• Odd numbers with exactly 5 distinct prime factors.at n=5A046391
• 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=18A046887
• Tritriangular numbers: a(n) = binomial(binomial(n,2),2) = n*(n+1)*(n-1)*(n-2)/8.at n=22A050534
• Number of symmetric types of (3,2n)-hypergraphs under action of complementing group C(3,2).at n=43A055780
• a(n) = floor(7^7/n).at n=30A057069
• McKay-Thompson series of class 22a for Monster.at n=27A058569
• Smallest triangular number which is a multiple (>1) of the n-th triangular number.at n=21A068084
• Triangular numbers which are products of triangular numbers larger than 1.at n=25A068143
• Numbers k such that Sum_{d|k} sigma(d)/d is an integer.at n=6A068986