-1223

Appears in sequences

• Expansion of (1-5*x-x^2+x^3)/((1+x)*(1-x)^3).at n=34A141354
• a(n)=1-4*n-4*n^2.at n=17A184882
• 2*n^3 - 313*n^2 + 6823*n - 13633.at n=2A218456
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 342", based on the 5-celled von Neumann neighborhood.at n=35A269512
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 261", based on the 5-celled von Neumann neighborhood.at n=17A271064
• a(n) = -n^2 + 21*n - 1.at n=46A332884
• G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * x^k/(k * (1 + x^k)^3) ).at n=19A363575
• Expansion of (1/x) * Series_Reversion( x/(x+1/(1+x^3)) ).at n=12A370837