26611200

Appears in sequences

• Number of degree-n permutations of order exactly 9.at n=11A061123
• Number of integers less than A000108(n) relatively prime to A000108(n).at n=17A062624
• Absolute value of determinant of n X n matrix whose entries are the integers from 1 to n^2 spiraling outward, ending in a corner.at n=6A079340
• a(n) = A081456(n)^(1/2).at n=16A081457
• Magic products of 6 X 6 multiplicative magic squares.at n=1A113026
• a(1) = 1. For n >= 2, a(n) = sum of the two (not necessarily distinct) earlier terms, a(j) and a(k), which maximizes d(a(j)+a(k)), where d(m) is the number of positive divisors of m. a(n) = the maximum (a(j)+a(k)) if more than one such sum has the maximum number of divisors.at n=30A115386
• a(n) = number of elements of order n in simple group Alt(12) of order 239500800.at n=8A145437
• Number of permutations of 1..n with no element e[i>=2]<e[1+floor((i-2)/5)] (5-way heap).at n=13A178010
• Number of permutations of 1..n with the sequence of sums of 5 adjacent elements having exactly 4 maxima.at n=2A179727
• a(n) = Product_{k=1..A003056(n)} prime(k)^T(n,k), with row n of T = row n of A237591.at n=15A348642
• a(n) is the least integer that can be written in two or more ways as the product of the integers in two subsets of its A070824(a(n)) nontrivial divisors, each of size n and with empty intersection.at n=6A354697
• Numbers whose divisors have a mean abundancy index that is larger than 3.at n=10A374779