129456

Appears in sequences

• Number of nonequivalent dissections of a polygon into n pentagons by nonintersecting diagonals rooted at a cell up to rotation.at n=7A005037
• a(n) = floor(C(n,6)/7).at n=32A011797
• Number of necklaces with 7 black beads and n-7 white beads.at n=26A032192
• T(n,7), array T as in A051168; a count of Lyndon words; aperiodic necklaces with 7 black beads and n-7 white beads.at n=26A051172
• a(n) = n*A001865(n).at n=5A063169
• 28-gonal pyramidal numbers: a(n) = n*(n+1)*(26*n-23)/6.at n=31A256648
• Array read by antidiagonals: T(n,k) is the number of nonequivalent dissections of a polygon into n k-gons by nonintersecting diagonals rooted at a cell up to rotation (k >= 3).at n=52A295222
• a(n) = Sum_{k=1..n} phi(gcd(k, n))^(n/gcd(k, n)).at n=34A342541