112233

Appears in sequences

• Smallest number whose digits can be permuted to get exactly n distinct palindromes.at n=5A082276
• Expansion of 1/((1-x)(1-x^2)(1-10x)).at n=5A104720
• Sorted list of strings that can be obtained by starting with 123 and repeatedly doubling any substring in place.at n=17A135475
• 6-digit numbers k such that: (a) the digits of k are from the set {1, 2, 3, 4, 5}, and (b) any digit that appears in k appears at least twice.at n=24A171725
• List of words of length n over an alphabet of size 9 that are in standard order and which have the property that every letter that appears in the word is repeated.at n=29A273978
• Numbers n=2*k-1 where Sum_{j=1..k} (-1)^(j+1) * d(2*j-1) achieves a new record, with d(n) = number of divisors of n (A000005).at n=28A318737