19873

Appears in sequences

• Length of n-th string generated by a Kolakoski(7,1) rule starting with a(1)=1.at n=12A095343
• Structured octagonal anti-diamond numbers (vertex structure 7).at n=16A100187
• Expansion of x*(1+2*x)/(1+x+x^2-2*x^3).at n=25A103749
• Difference between squares of legs of primitive Pythagorean triangles, sorted (with multiplicity).at n=35A127923
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+167)^2 = y^2.at n=9A130608
• 3n^3 - 2n^2 + n - 1.at n=18A130885
• Number of partitions of n into parts with no prime gaps in their factorization.at n=37A137792
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.at n=7A151150
• 7 times heptagonal numbers: a(n) = 7*n*(5*n-3)/2.at n=34A152777
• (1, 3, 5, 7, 9, ...) convolved with (1, 0, 3, 5, 7, 9, ...).at n=31A179903
• Number of unordered full binary trees with labels from a set of n labels.at n=6A220452
• Real part of (n + i)^4.at n=12A272870
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 613", based on the 5-celled von Neumann neighborhood.at n=25A273243
• Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with determinant = 2*permanent.at n=24A280343