54768

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 39.at n=5A031717
• Number of one-sided n-celled polyzebras (or zebra-move-connected polyominoes).at n=6A093990
• Expansion of 1/(4*sqrt(1-4*x) - 3).at n=5A115970
• Apply partial sum operator 5 times to primes.at n=13A254784
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 441", based on the 5-celled von Neumann neighborhood.at n=7A272222
• a(n) = [x^n] ( S(x/(1 + x)) )^n, where S(x) = (1 - x - sqrt(1 - 6*x + x^2))/(2*x) is the o.g.f. of the large Schröder numbers A006318.at n=6A333473
• Expansion of e.g.f. 1/(1 - x*(exp(x) - 1)^3).at n=8A392821