68081

Appears in sequences

• Expansion of 1/(1 - x - x^2 + x^4 - x^6).at n=28A117791
• Positive numbers y such that y^2 is of the form x^2+(x+119)^2 with integer x.at n=37A156650
• A triangular sequence of polynomial coefficients:p(x,n)=Sum[Eulerian[n + 1, k]*Product[x + i, {i, 0, n - k + 1}]*(-x)^k, {k, 0, n}]/x.at n=27A174833
• The number of permutations of length n sortable by 2 prefix block transpositions.at n=23A228394
• Number of partitions p of n such that median(p) <= multiplicity(min(p)).at n=46A240213