43128

Appears in sequences

• Least k such that the first k terms of A006928 contain n more 2's than 1's.at n=21A025507
• Numbers n such that 237*2^n-1 is prime.at n=35A050877
• Symmetric triangle, read by rows, where row n equals the (n+1)-th differences of the crystal ball sequence for D_n lattice, for n>=0.at n=49A108558
• Symmetric triangle, read by rows, where row n equals the (n+1)-th differences of the crystal ball sequence for D_n lattice, for n>=0.at n=50A108558
• Row sums in A133397.at n=3A133396
• Recursion based on Exp[Pi/4]: a(n)=Floor[a(n-1)*Exp[Pi/4]] Angular domain {0,Pi/4} is the smallest self-similar piece of a sine wave.at n=15A136671
• Number of groups of order prime(n)^6.at n=29A232106
• Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=30A259004
• Least positive integer k such that both k and k*n belong to the set {m>0: 2*prime(prime(m))+1 = prime(p) for some prime p}.at n=42A261362
• a(n) = 3*p^2+39*p+344+24*gcd(p-1,3)+11*gcd(p-1,4)+2*gcd(p-1,5), where p = prime(n).at n=29A269749
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood.at n=40A270016
• Indices in A006928 where the imbalance between 1's and 2's sets a new record.at n=34A274775
• Number of nX6 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=7A302210
• Number of nonequivalent minimal total dominating sets in the n-cycle graph up to rotation.at n=51A302918
• Triangle Read by rows: T(n,k) is the number of rooted ordered trees with n non-root nodes with non-root node labels in {1,..,k} such that all labels appear at least once in all groups of sibling nodes.at n=40A385123