22792

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-2)/3.at n=30A048020
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-3)/3.at n=30A048031
• a(n) = 4*a(n-1) - a(n-2) + 3 with a(0)=1, a(1)=7.at n=7A055269
• (-1)^n * coefficient of x^n in 1/x-1/(1-eta(x)) power series.at n=27A082531
• Members of A000124 which are multiples of 11.at n=38A083511
• Least power of 3 having exactly n consecutive 6's in its decimal representation.at n=7A131547
• Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = ( (1-x)^(n+1) * Sum_{k >= 0} (2*k+1)^(n-1)*x^k )^2, read by rows.at n=28A165890
• Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = ( (1-x)^(n+1) * Sum_{k >= 0} (2*k+1)^(n-1)*x^k )^2, read by rows.at n=32A165890
• a(n) = floor((5^n+1)/(2*3^n)).at n=20A238777
• Number T(n, k) of ways to place k points on an n X n X n triangular grid so that no pair of them has distance sqrt(3). Triangle read by rows.at n=45A244500
• Number of length 3 1..(n+2) arrays with no leading or trailing partial sum equal to a prime.at n=43A254206
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 926", based on the 5-celled von Neumann neighborhood.at n=35A273778
• a(n) is the number of squares of side length greater than 1 having vertices at the points of an n X n grid of dots.at n=22A328152
• a(n) = Sum_{i|n, j|n, k|n} i*j*k/lcm(i,j,k).at n=41A344135