22920

Appears in sequences

• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,7.at n=22A064240
• Maximal value of Sum_{i=1..n} (p(i) - p(i+1))^2, where p(n+1) = p(1), as p ranges over all permutations of {1, 2, ..., n}.at n=40A064842
• Integers k such that k*28*c + 1 is prime for c = 1, 2, 4, 7 and 14.at n=13A067199
• Number of balanced numbers <= 2^n.at n=35A078662
• a(n) = n*(n^2+3*n-1)/3.at n=40A084990
• Triangle of the numbers of unique-valued sequences of all lengths (from 1 to 2n-1) consisting of unit matrices (="matrix units") of order n.at n=29A114595
• INVERT transform of A002321, Mertens's function.at n=23A144031
• Number of permutations of 1..n with i-6<=p(i)<=i+5.at n=7A179343
• a(n) = n*(14*n + 13).at n=40A195028
• Number of solid standard Young tableaux of shape [[2*n,2],[2]].at n=8A215687
• Number of solid standard Young tableaux of shape [[8*n,n],[n]].at n=2A246633
• Expansion of Product_{k>=1} ((1 + k*x^k) / (1 + x^k))^k.at n=14A268501
• Number of inequivalent ways to color the edges of a tetrahedron using at most n colors so that no two adjacent edges have the same color.at n=10A282818
• Sum of the areas of the distinct rectangles (and the areas of the squares on their sides) with positive integer sides such that L + W = n, W < L.at n=31A294139
• Indices of unique values in A329152.at n=26A333268
• Triangle T(n,m) = C(n-1,n-m)*Sum_{k=1..n} C(2*k-2,k-1)*C(n-m,m-k)/m, m>0, n>0, n>=m.at n=51A337977
• 4*a(n) is the maximum possible determinant of a 3 X 3 matrix whose entries are 9 consecutive primes starting with prime(n).at n=12A340923
• Numbers k such that A348215(k) = k.at n=36A348216
• a(n) = Sum_{k=1..n} floor(n/(2*k-1))^3.at n=27A350144
• a(0)=1, a(1)=0; a(n) = floor(n/2)*(a(n-1) + a(n-2)).at n=10A361938