33250

Appears in sequences

• When expressed in base 2 and then interpreted in base 7, is a multiple of the original number.at n=38A062848
• Numbers n such that phi(n+1) = 3*phi(n).at n=36A067143
• Number of base 32 circular n-digit numbers with adjacent digits differing by 1 or less.at n=8A124804
• Numbers k such that phi(phi(k)) = sigma(rad(k)).at n=36A173748
• Number of rooted planar binary unlabeled trees with n leaves and caterpillar index <= 4.at n=12A214200
• Numbers k such that A037610(k) is prime.at n=7A261672
• Lesser of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=18A323329
• Numbers that can be written as the product of two divisors greater than 1 such that the number is contained in the string concatenation of the divisors.at n=36A355790
• Triangle T(n,k), n >= 0, 0 <= k <= n, read by rows, where T(n,k) = Sum_{j=k..n} 2^(n-j) * Stirling2(n,j) * Stirling2(j,k).at n=41A383206