-1763

Appears in sequences

• a(n) = -n^2 + 9*n + 23.at n=47A126719
• a(n) = (-1)^n*n*(n-2).at n=42A131386
• Expansion of (1-5*x-x^2+x^3)/((1+x)*(1-x)^3).at n=41A141354
• Expansion of 1/(1 +x -2*x^2 -x^3 -x^4 -3*x^5 +2*x^6 +2*x^7 +3*x^8 +2*x^9 -3*x^10 -7*x^11 -3*x^12 -5*x^13).at n=21A143372
• Years in which a transit of Venus (as seen from Earth) took place or is expected to occur, according to the catalog by Fred Espenak.at n=3A171467
• a(n) = 1 - n^2.at n=42A258837
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood.at n=23A270017
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 457", based on the 5-celled von Neumann neighborhood.at n=27A272283