2080768

Appears in sequences

• a(n) = 4^n * (2^n - 1).at n=7A059409
• Jordan function J_7(n).at n=7A069092
• a(n) = p(p+1)^2, where p is the n-th prime.at n=30A178398
• Difference of two positive 7th powers.at n=25A181126
• Monotonic ordering of nonnegative differences 8^i-4^j, for 40>= i>=0, j>=0.at n=37A192168
• Non-unitary amicable numbers.at n=29A259037
• Smaller of a non-unitary amicable pair.at n=15A259038
• 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 499", based on the 5-celled von Neumann neighborhood.at n=20A284042
• 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 497", based on the 5-celled von Neumann neighborhood.at n=20A288705
• a(n) = 2^n - 2^floor(2n/3).at n=21A291779
• Nonunitary superperfect numbers: numbers k such that nusigma(nusigma(k)) = k, where nusigma(k) = sigma(k) - usigma(k) is the sum of nonunitary divisors of k (A048146).at n=33A329884
• Number of ways to split a composition of n into contiguous subsequences with different sums.at n=16A336127