21885

Appears in sequences

• a(n) = floor(log(5)^n).at n=21A014216
• Number of ways to partition the set of divisors of the n-th abundant number into three subsets such that their sums form an integer triangle.at n=24A091235
• Numbers k such that 4*k-1, 8*k-1, 16*k-1 and 32*k-1 are all primes.at n=13A101794
• Numbers whose trajectory under the Esucarys map ends at the fixed point 247.at n=27A129133
• Number of partitions of n containing 2*h as a part, where h is the number of distinct parts.at n=48A239947
• Molien series for invariants of finite Coxeter group A_11.at n=55A266780
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 718", based on the 5-celled von Neumann neighborhood.at n=40A273427
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 203", based on the 5-celled von Neumann neighborhood.at n=15A279810
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 998", based on the 5-celled von Neumann neighborhood.at n=14A284546
• Antidiagonal sums of the array defined in A385623.at n=29A385624