-4271

Appears in sequences

• exp(sin(arcsinh(x))) = 1+x+1/2!*x^2-1/3!*x^3-7/4!*x^4+1/5!*x^5...at n=8A012034
• cosh(sin(arcsinh(x))) = 1+1/2!*x^2-7/4!*x^4+121/6!*x^6-4271/8!*x^8...at n=4A012043
• a(n) = -a(n-1) + 3*a(n-2), starting a(1)=1, a(2)=2.at n=12A140165
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood.at n=37A271163