-845

Appears in sequences

• Coefficients of the 3rd-order mock theta function f(q).at n=54A000025
• Coefficient of q^(2n) in the series expansion of Ramanujan's mock theta function f(q).at n=27A000039
• Triangle T(n, k) = Product_{j=1..k} Product_{i=0..j-1} ( 1 - (n-k+1)*(3*i-2) ) with T(n, 0) = 1 and T(n, n) = n!, read by rows.at n=30A156730
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 371", based on the 5-celled von Neumann neighborhood.at n=17A271457
• a(n) = Sum_{k=1..n} (-1)^(k-1) * binomial(k+2,3) * floor(n/k).at n=21A366938
• The unique sequence such that Sum_{d|n} d*a(d)^(n/d) = sigma(n)^2 for every n.at n=11A383614