25808

Appears in sequences

• Denominators of continued fraction convergents to sqrt(261).at n=10A041489
• a(n) is the index of the smallest triangular number containing exactly n 3's.at n=5A048358
• Half the number of (n+2)X4 binary arrays with each 3X3 subblock having sum 4 or 5.at n=2A186818
• Half the number of (n+2)X5 binary arrays with each 3X3 subblock having sum 4 or 5.at n=1A186819
• T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having sum 4 or 5.at n=7A186825
• T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having sum 4 or 5.at n=8A186825
• G.f. satisfies: A(x) = Product_{n>=1} (1 + x^n*A(x))/(1 - x^n*A(x)).at n=7A190862
• Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=3A302005
• Number of nX4 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=3A302006
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=24A302010
• Number of 4 X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=3A302011
• Dirichlet self-convolution of the integer partition numbers A000041.at n=34A323764
• Squares where A323809 gets stuck.at n=15A323813
• a(n) is the least number k such that the continued fraction of the harmonic mean of the divisors of k contains n elements that are all distinct.at n=7A349503
• Number of subsets of {1..n} without a subset summing to n.at n=21A365377