1505280

Appears in sequences

• Smallest number beginning with the digits of n that has exactly n prime factors (counted with multiplicity).at n=14A109686
• The decomposition of a certain labeled universe (A052584), triangle read by rows.at n=33A159749
• Composite numbers m such that Product_{i=1..k} (p_i/(p_i-1)) / Sum_{i=1..k} (p_i/(p_i+1)) is an integer, where p_i are the k prime factors of m (with multiplicity).at n=34A230112
• Triangle read by rows, T(n,k) with n,k > 1, is the number of subsequences of length k over all permutations of [n], which are neither increasing or decreasing.at n=22A373766