181000

Appears in sequences

• Row sums of (denominator) triangle A119948.at n=9A119950
• a(n) = sum(abs(stirling1(n,k))*stirling2(n+1,k+1),k=0..n).at n=6A192548
• Numbers k such that k*(k+1)/2 - sigma(k) = concat(s,t) and k = s + t, where sigma(k) is the sum of the divisors of k.at n=11A272779
• Numbers k such that (sigma(k) - k)^(sigma(k) - k) == k (mod sigma(k)), where sigma = A000203.at n=33A375790