76020

Appears in sequences

• Number of positive words of length n in the monoid Br_7 of positive braids on 8 strands.at n=8A097554
• a(n) = n*(n+1)*(n^2-2*n+2)/2.at n=20A101375
• T(n,k) is the number of partial bijections (or subpermutations) of an n-element set of height k (height(alpha) = |Im(alpha)|) and with exactly 2 fixed points.at n=25A144091
• Number of compositions of n into distinct parts where each part i is marked with a word of length i over a ternary alphabet whose letters appear in alphabetical order and all letters occur at least once in the composition.at n=7A261854