2727274

Appears in sequences

• Sub-Kaprekar numbers: k such that k = |q - r| and k^2 = q*10^m + r, for some m >= 1, q >= 0, 0 <= r < 10^m, with k not a power of 10.at n=18A118936
• Sub-Kaprekar numbers (2): n such that n=r-q and n^2=q*10^m+r, for some m>=1, q>=0, 0<=r<10^m, with n not a power of 10.at n=6A118938
• Unabridged sub-Kaprekar numbers (A118936, but allowing powers of ten).at n=24A228381
• Numbers k of the form a - b + c, such that k^3 equals the decimal concatenation a//b//c and numbers k, b, and c have the same number of digits.at n=27A259379
• Numbers k of the form abs(a - b + c - d) such that k^4 equals the concatenation of a//b//c//d and numbers k,b,c,d have the same number of digits.at n=26A260193
• Records in A341755 (= length of chain of (k,k+1) sharing a digit with k+(k+1), starting at n).at n=19A341756