-1679
domain: Z
Appears in sequences
- a(n) = -n^2 + 9*n + 23.at n=46A126719
- Triangle of coefficients of characteristic polynomials of a special type of Cartan matrix: E_n for E_6,E_7,E_8,E_11 example M(6)/ E_6: {{2, -1, 0, 0, 0, 0}, {-1, 2, -1, 0, 0, 0}, {0, -1, 2, -1, 0, -1}, {0, 0, -1, 2, -1, 0}, {0, 0, 0, -1, 2, 0}, {0, 0, -1, 0, 0, 2}},.at n=48A136600
- Expansion of (1-5*x-x^2+x^3)/((1+x)*(1-x)^3).at n=40A141354
- a(n)=1-4*n-4*n^2.at n=20A184882
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood.at n=21A270086
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 323", based on the 5-celled von Neumann neighborhood.at n=21A271256
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 345", based on the 5-celled von Neumann neighborhood.at n=21A271296
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 405", based on the 5-celled von Neumann neighborhood.at n=21A271815
- a(n) = n! * Sum_{d|n} mu(n/d) / d!.at n=7A354022
- Expansion of e.g.f. exp(x * (1 + x^3)^(1/3)).at n=8A373522
- Expansion of e.g.f. exp(x/(1 + x^4)^(1/4)).at n=8A373540