86768

Appears in sequences

• Palindromes with exactly 7 prime factors (counted with multiplicity).at n=17A046333
• Number of independent components for a Weyl tensor in n dimensions.at n=29A052472
• T(n,n-5), where T is the array in A055830.at n=32A055832
• a(1) = 1, a(n) is the smallest integer > a(n-1) such that the largest element in the simple continued fraction for S(n) = 1/a(1) + 1/a(2) + ... + 1/a(n) equals n^4.at n=5A070904
• a(n) = (-1)^(n+1) * n*(n-1)*(n-4)*(n+1)/12.at n=31A167387
• Number of length 4+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero.at n=10A250323
• The number of regions formed inside an isosceles triangle by straight line segments mutually connecting all vertices and all points that divide the two equal length sides into n equal parts; the base of the triangle contains no points other than its vertices.at n=24A332953