166665
domain: N
Appears in sequences
- When squared gives number composed of digits {2, 5, 7}.at n=8A030487
- Write 0, 1, ..., n in binary and add as if they were decimal numbers.at n=30A067894
- a(n) = sum of all cyclic permutation of concatenation of first n numbers. In each case the digits of a number are kept together for n>9.at n=4A083956
- Duplicate of A083956.at n=4A094760
- Murai Chuzen numbers.at n=41A225488
- Numbers n such that the decimal digits of n^2 are all prime.at n=26A275971
- a(n) = n*(1 + n)*(10^n - 1)/18.at n=5A365645