-447

Appears in sequences

• Even coefficients in expansion of e.g.f. sec(arcsin(arctan(x))).at n=4A012097
• sech(tan(sin(x)))=1-1/2!*x^2+1/4!*x^4+47/6!*x^6-447/8!*x^8...at n=4A012149
• Expansion of e.g.f. exp(arctanh(arctan(x))).at n=8A012260
• a(n+1) = a(n) - a(floor(n/2)), with a(0)=0, a(1)=1.at n=50A062187
• Expansion of (1-x)^(-1)/(1-x+2*x^2-2*x^3).at n=22A077874
• Expansion of (1-x)^(-1)/(1-2*x^2+2*x^3).at n=13A077881
• Expansion of 1/((1-x)*(1+x+2*x^2+x^3)).at n=24A077913
• Expansion of (1-x)/(1-2*x+2*x^2+x^3).at n=12A078004
• Column 1 of triangle A091614.at n=12A091623
• Coefficients of the eighth-order mock theta function T_1(q).at n=35A153156
• Diagonal sums of generalized Narayana triangle A180957.at n=12A180958
• G.f.: x^((k^2+k)/2)/(mul(1-x^i,i=1..k)*mul(1+x^r,r=1..oo)) with k = 3.at n=67A246582
• Expansion of 1 / (1 + x + x^2 - x^5) in powers of x.at n=48A247920
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 363", based on the 5-celled von Neumann neighborhood.at n=13A268194
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 105", based on the 5-celled von Neumann neighborhood.at n=13A270163
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 129", based on the 5-celled von Neumann neighborhood.at n=13A270220
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 411", based on the 5-celled von Neumann neighborhood.at n=15A271892
• G.f.: Product_{i>0} 1/(Sum_{j>=0} j!*x^(j*i)).at n=6A293251
• a(0) = 0, a(n) = -5*a(n/3) if n is divisible by 3, otherwise a(n) = n + a(n-1).at n=62A318488
• Expansion of Product_{k>0} 1/(Sum_{m>=0} x^(k*m^3)).at n=47A320120