181800

Appears in sequences

• a(n) is least k such that k and 6k are anagrams in base n (written in base 10).at n=30A023098
• Number of reduced words of length n in the Weyl group D_8.at n=21A162211
• Number of reduced words of length n in the Weyl group D_8.at n=35A162211
• Smallest number k such that prime(n) is the n-th divisor of k.at n=24A221647
• Numbers k having at least two complementary pairs of divisors (q, p) and (p', q') such that k = p*q = p'*q' where the decimal digits of p' are the 9's complement of the decimal digits of p and the decimal digits of q' are the 9's complement of the decimal digits of q.at n=32A226587