454545454

Appears in sequences

• Integers are written in the form abcd...n where "a" means: This integer contains "a" times the digit b; "b" means: This integer contains "b" times the digit c; "c" means: This integer contains "c" times the digit d; ... and "n" means nothing.at n=27A105959
• Numbers k such that k * (k+1) is the concatenation of a number m with itself.at n=14A116285
• Smallest positive integer divisible by n to occur as the initial digits in the decimal expansion of the reciprocal of n, or 0 if impossible.at n=21A242075