179960

Appears in sequences

• Number of nonempty subsets of {1, 2, ..., n} with <=9 pairwise coprime elements.at n=37A187270
• a(0) = -1, a(1) = 1, a(n) = a(n-1) + (n-1)*a(n-2) for n > 1.at n=13A291856
• a(n) is the smallest n-gonal number whose sum of digits is n.at n=29A359003