818181
domain: N
Appears in sequences
- Expansion of g.f. 1/((1-9*x)*(1-12*x)).at n=5A016191
- Kaprekar numbers: numbers k such that k = q + r and k^2 = q*10^m + r, for some m >= 1, q >= 0 and 0 <= r < 10^m. Here q and r must both have the same number of digits.at n=29A045913
- Numbers whose consecutive digits differ by 7.at n=33A048409
- The full list of 6-Kaprekar numbers.at n=26A053397
- List of words over {1,8} with equal numbers of 1's and 8's.at n=22A214531
- Square roots of terms in A238237.at n=33A290449
- Terms of A338039 that are repeated concatenations of smaller integers.at n=11A338166
- Kaprekar numbers (A006886) that are divisible by the sum of their digits.at n=21A382165