69025

Appears in sequences

• Number of pure 3-complexes on 8 unlabeled nodes with n multiple 3-simplexes.at n=7A050910
• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=1} (n+1-i)*(n+1-j).at n=24A115004
• Symmetric triangle, read by rows of 2*n+1 terms, similar to triangle A008301. Second term 5 times first term.at n=20A126155
• Main diagonal and central terms of symmetric triangle A126155.at n=4A126157
• Number of ordered set partitions of [n] into ten blocks such that equal-sized blocks are ordered with increasing least elements.at n=2A285925
• Number of (binary) max-heaps on n elements from the set {0,1} containing exactly six 0's.at n=36A326507
• a(n) = A115004(2n+1).at n=12A331759