31802

Appears in sequences

• Length of hypotenuse squared in right triangle formed by a palindromic spiral plotted in Cartesian coordinates.at n=21A048871
• Coefficients of numerator of recursively defined rational function: p(x,3)=x*(x^2 + 8*x + 1)/(1 - x)^4; p(x, n) = 2*x*D[p(x, n - 1), x] - p(x,n-2).at n=37A166346
• Coefficients of numerator of recursively defined rational function: p(x,3)=x*(x^2 + 8*x + 1)/(1 - x)^4; p(x, n) = 2*x*D[p(x, n - 1), x] - p(x,n-2).at n=43A166346
• a(n) = floor(1/{(10+n^4)^(1/4)}), where {}=fractional part.at n=42A184634
• Expansion of g.f. 1/ (1-x^1*(1-x^(m+1))/ (1-x^2*(1-x^(m+2))/ (1- ... ))) for m=8.at n=21A185648
• Number of nX3 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.at n=4A201620
• Number of nX5 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.at n=2A201622
• T(n,k)=Number of nXk 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.at n=23A201625
• T(n,k)=Number of nXk 0..3 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.at n=25A201625
• Number of double palindrome structures of length n using exactly three different symbols.at n=15A328689
• Number of compositions (ordered partitions) of n into distinct parts, the least being 3.at n=42A339164