33667

Appears in sequences

• Numbers whose square has its digits in nondecreasing order.at n=47A028819
• Special connected numbers: minimal and maximal connected numbers (cf. A029827) of a given binary order, i.e., between two consecutive powers of 2.at n=22A036379
• (n - phi(n)) | sigma(n) for composite n not congruent to 2 (mod 4).at n=33A055164
• a(n) = A052217(n)/3.at n=41A088405
• Number of third differences of arrays of length 5 of numbers in 0..n.at n=30A228261
• Integers n such that digits in n and n^2 are in nondecreasing order.at n=38A234841
• Numbers of the form (10^a + 10^b + 1)/3.at n=18A237424
• a(n) = Sum_{1 <= x_1 <= x_2 <= x_3 <= x_4 <= x_5 <= n} gcd(x_1, x_2, x_3 , x_4, x_5, n).at n=18A343519
• Numbers k such that k^6*2^k - 1 is a prime.at n=15A367478