-683
domain: Z
Appears in sequences
- Expansion of 1/(1 + x + 2*x^2 + 2*x^3).at n=21A077980
- Abundance values of numbers whose abundance is (+-1) times a prime.at n=34A088006
- Expansion of (1+x^2)/((1-x+x^2)*(1+2*x^2)).at n=22A102517
- Diagonal sums of triangle A110324.at n=36A110326
- Expansion of (1-x^3)/((1-x^2)*(1+2*x^2)).at n=23A117576
- a(n) = -n^2 + 9*n + 53.at n=32A126665
- a(n) = A140944(n+1) - 3*A140944(n).at n=45A140950
- Array T(n,k) read by antidiagonals: the k-th term of the n-th difference of A131531.at n=77A167613
- Second differences of A000463; first differences of A188652.at n=36A188653
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 369", based on the 5-celled von Neumann neighborhood.at n=15A270793
- Increasingly larger (in absolute value) extrema of the Mertens function A002321 between subsequent zeros.at n=27A304242