184746

Appears in sequences

• a(n) = binomial(2n,n) - n; number of (weakly) increasing or decreasing maps from 1,...,n to 1,...,n.at n=10A045992
• Let n have j digits {d_j, d_(j-1), ..., d_2, d_1}. Sequence lists numbers n such that n = d_j^b_j + d_(j-1)^b_(j-1) + ... + d_2^b_2 + d_1^b_1 for some permutation {b_j, b_(j-1), ..., b_2, b_1} of the digits.at n=15A276170