18557

Appears in sequences

• Numerators of continued fraction convergents to sqrt(53).at n=8A041090
• Numbers n for which there are exactly ten k such that n = k + reverse(k).at n=10A072434
• a(n) = 7*a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 7.at n=5A086902
• Number of permutations of length n which avoid the patterns 1234, 1432, 2341.at n=9A116758
• Number of ordered sextuples of distinct pairwise coprime positive integers with largest element n.at n=40A186977
• Consecutive exclusionary squares: Numbers n such that n^2 does not contain digits of n and (n+1)^2 does not contain digits of n+1.at n=50A247843
• a(n) = n*(n+1)*(11*n +10)/6.at n=21A254407
• a(n) = n^5 + 5*n^3 + 5*n.at n=7A261391
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 605", based on the 5-celled von Neumann neighborhood.at n=25A273177
• Square array A read by antidiagonals: the columns are given by A(n,1)=1, A(n,2)=n+1, A(n,3) = n^2+2n+3, A(n,4) = n^3+3*n^2+6*n+4, A(n,5) = n^4+4*n^3+10*n^2+12*n+7, ..., whose coefficients are given by A104509 (see also A118981).at n=60A309220
• Expansion of Sum_{k>=1} x^k / (1 - k * x^k)^k.at n=19A324158
• Indices of metallic means that are powers of other metallic means.at n=39A352403
• Array read by downward antidiagonals: A(n,k) = (k+1)^2*A(n-1,k) + A(n-1,k+1) with A(0,k) = 1, n >= 0, k >= 0.at n=31A369527