1666681

Appears in sequences

• Smallest square containing exactly n 6's.at n=3A036513
• Squares composed of digits {1,6,8}.at n=5A053909
• Define sds(n) = sum of the squares of the digits of n. Sequence gives smaller of two consecutive squares with sds(k^2) = sds((k+1)^2).at n=9A069645
• a(n) = smallest nontrivial square (i.e., not a multiple of 10) with exactly n identical adjacent digits.at n=3A137416
• a(n) = smallest nontrivial square (i.e., not a multiple of 10) with at least n identical adjacent digits.at n=3A169859
• Centered pentagonal numbers (A005891) which are also centered octagonal numbers (A016754).at n=2A253579
• Squares (A000290) which are also centered pentagonal numbers (A005891).at n=4A254333
• Numbers k such that sigma(k^3) is prime.at n=32A279096