67897830

Appears in sequences

• a(n) = 5*(n+1)*binomial(n+2,10).at n=12A027783
• a(n) = 13*(n+1)*binomial(n+2,13)/2.at n=9A027786
• Numbers k which, for some r, are r-digit maximizers of k/phi(k).at n=22A065800
• Numbers with exactly 8 distinct prime divisors {2,3,5,7,11,13,17,19}.at n=6A147575
• Number of 2n-length strings of balanced parentheses of exactly 9 different types that are introduced in ascending order.at n=2A258397
• The smallest nonpalindromic number that shares n or more distinct prime factors with the prime factors of its reverse.at n=7A372488