-1376

Appears in sequences

• Exponential reversion of rooted trees A000081.at n=7A050396
• McKay-Thompson series of class 12f for the Monster group.at n=22A112149
• a(n) = 1 + 3*n - 2*n^2.at n=27A168244
• G.f. satisfies: A(x) = 1 + Sum_{n>=1} (A(x)^n + A(x)^-n) * x^(n^2).at n=8A190791
• G.f.: Product_{n>=1} ((1-x^n)/(1+x^n))^(2*n).at n=26A216406
• a(n) = - (a(n-1) + 1) * a(n-2) with a(1) = a(2) = 1.at n=8A243004
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 22", based on the 5-celled von Neumann neighborhood.at n=31A269718
• a(n) is the smallest error in trying to solve n^4 = x^4 + y^4. That is, for each n from 2 on, find positive integers x and y, x <= y < n such that |n^4 - x^4 - y^4| is minimal and let a(n) = n^4 - x^4 - y^4.at n=19A308834