1802240

Appears in sequences

• a(n) is the least number having sum of digits n in base 10 and also exactly n prime factors (counted with multiplicity).at n=15A113758
• Row sums of triangle A133085.at n=17A133086
• Number of divisors of A138113(n).at n=27A140410
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 461", based on the 5-celled von Neumann neighborhood.at n=20A282370
• Start with a single cell at coordinates (0, 0, 0), then iteratively subdivide the grid into 3 X 3 X 3 cells and remove the cells whose sum of modulo 2 coordinates is 2 or 3; a(n) is the number of cells after n iterations.at n=5A285393
• Number of 6-cycles in the n-hypercube graph.at n=12A290031
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 870", based on the 5-celled von Neumann neighborhood.at n=20A290625
• Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=6A304466
• Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=6A304471
• Numbers whose product of prime indices equals their product of prime exponents (prime signature).at n=34A353503
• Fixed points of map n -> A366275(n).at n=35A366277