125589domain: NAppears in sequencesNumbers n such that the sum of the digits of Sum_{k=1..n} (k!) is divisible by n.at n=26A109657a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once.at n=12A143192