50191

Appears in sequences

• Number of products of distinct factorials not exceeding n!.at n=44A101977
• Sum of proper divisors minus the number of proper divisors of the number of partitions of n, A000041(n).at n=39A152987
• Number of ways to place 4 nonattacking grasshoppers on a chessboard of size n x n.at n=5A190396
• Number of length-4 0..n arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.at n=13A268458
• Partial sums of A299289.at n=28A299290
• Number of subsets of {1..n} whose elements have the same number of prime factors, counted with multiplicity.at n=45A339511
• 11-gonal numbers which are products of two distinct primes.at n=15A354448
• Numbers k such that 8*k^2 + 8*k - 7 is a square.at n=6A358682
• Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(x) * (1 - x*exp(x)) ).at n=6A379684