-473

Appears in sequences

• First order recursion: a(0)=1; a(n) = sigma(1,n) - a(n-1).at n=51A083238
• a(n) = 7 + 12*n - 6*n^2.at n=10A157517
• Sequence of coefficients arising in study of generating function for A067619.at n=31A186545
• a(n) = p(n) - p(n-1) - p(n-2) + p(n-5), where p(n) = A000041(n).at n=28A195054
• Irregular array read by rows in which row n lists the integers k, in ascending order, for which there is a primitive cycle of n positive integers under iteration by the Collatz-like 3x+k function.at n=26A226619
• Triangle read by rows: coefficients of generating functions U_{1324,n}(y).at n=61A230858
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 115", based on the 5-celled von Neumann neighborhood.at n=11A270184
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 123", based on the 5-celled von Neumann neighborhood.at n=11A270213
• Triangle T(n,k) read by rows, giving even-numbered coefficients of the matching polynomial of the n-ladder graph.at n=32A308244
• Expansion of Product_{k>=1} (1 + x^k/(1 + x)^k).at n=14A320591
• Expansion of Product_{i>0, j>0, k>0} (1 - x^(i^2 + j^2 + k^2)).at n=51A321432
• Expansion of Product_{k>=1} 1 / (1 + mu(k)^2 * x^k).at n=53A329069