52430

Appears in sequences

• Numerators of continued fraction convergents to sqrt(521).at n=9A041996
• Triangle T(n,k) of k-block T_0-tricoverings of an n-set, n >= 3, k = 0..2*n.at n=53A059530
• Triangle T(n,k) of k-block tricoverings of an n-set (n >= 3, k >= 4).at n=33A060487
• (n concatenated n times) - n^n.at n=4A083451
• Indices of primes in sequence defined by A(0) = 91, A(n) = 10*A(n-1) + 71 for n > 0.at n=12A101016
• Unsigned row sums of triangle A118404.at n=18A118406
• Erroneous version of A140763.at n=37A159579
• a(n) = (6-(-4)^n)/5.at n=9A166114
• a(n) is the number of words of length n over the alphabet {a,b,c} with an even number of appearances of the letter 'a' and the sum of appearances of the letters 'b' and 'c' add up to at most 3.at n=35A341896
• a(n) = ceiling((2^n+n-1)/n).at n=19A373895