100890

Appears in sequences

• Numbers k such that k and 9*k are anagrams.at n=9A023093
• [ (3rd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+2 positive integers congruent to 1 mod 4}.at n=18A024386
• Numbers whose set of base 7 digits is {0,6}.at n=35A097253
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives z numbers.at n=19A125492
• Smallest number requiring n steps to reach a palindrome under the "add a digit" process described in A241173.at n=28A241174
• Those primitive elements of A337386 that have exactly one primitive nondeficient divisor (A006039).at n=39A341604