103040

Appears in sequences

• Numbers k such that k! - 1 is prime.at n=24A002982
• Number of permutations of n elements containing a 3-cycle.at n=9A027617
• List of pairs of consecutive refactorable numbers.at n=10A036898
• A088258 indexed by A000142.at n=42A088412
• a(1) = 1, a(2) = 2, next terms up to a(2n-1) are obtained by multiplying previous terms a(n-1) by n+1, a(n-2) by n+2 etc. a(2) by (2n-2) and a(1) by 2n-1. On similar lines a(2n) = 2n*a(2n-2), a(2n+1) = (2n+1)*a(2n-1) and so on.at n=45A109844
• Numbers k such that k and k+1 are both refactorable numbers.at n=5A114617
• Number of collinear point 6-tuples in an n X n .. X n 4-dimensional cubical grid.at n=7A178271
• Irregular triangle read by rows: coefficients in order of decreasing exponents of polynomials P_g(x) related to Hultman numbers.at n=18A185259
• Numbers with prime factorization pqrs^7.at n=32A190473
• Triangular array read by rows. T(n,k) is the number of 2-colored labeled graphs on n nodes with exactly k edges; n >= 0, 0 <= k <= A002620(n).at n=45A228890
• Irregular triangular array read by rows: T(n,k) is the number of 2-colored simple labeled graphs on n nodes that have exactly k edges, 0<=k<=A002620(n), n>=1.at n=44A241669
• Triangle T(n,k) is the number of permutations on n elements with at least one k-cycle for 1 <= k <= n.at n=38A293211
• Number of minimum total dominating sets in the n-antiprism graph.at n=39A302652
• Numbers k such that k = Product (p_j^e_j) = Product (p_j*(e_j + 1)).at n=36A304410
• Indices of records in A327007.at n=12A327009
• a(n) = 2*((-1)^n - 1)*(F(n) - 1) - (3*(-1)^n + 7)/2 * F(n+1) + 5*F(n+1)^2.at n=11A330050
• Triangle read by rows: T(n,k) is the number of non-crossing set partitions of {1..5n} into n sets of 5 with k of the sets being a contiguous set of elements.at n=23A334063
• Numbers that are the sum of four third powers in exactly ten ways.at n=32A345156
• Two-column array read by rows, where the n-th row is the least pair of integers (p, q) such that f(p) = f(n) + q*f(n+1) where f(n) = A002496(n) is the n-th prime of the form k^2+1.at n=21A352582