7087260

Appears in sequences

• E.g.f.: (exp(x)-1)^2/(2-exp(x)).at n=9A052875
• Triangle read by rows: T(n,k) = Sum_{i=k..n} i!*Stirling2(n,i), n >= 1, 1 <= k <= n.at n=37A084416
• Number of ordered set partitions of [n] with at most eight elements per block.at n=9A276928
• Number of length n primitive (aperiodic) palindromes with integer entries that cover an initial interval of positive integers.at n=17A327874
• Number of primitive (period n) periodic palindromes with integer entries that cover an initial interval of positive integers.at n=17A327879
• Number of ordered partitions of an n-set without blocks of size 9.at n=9A343792