71281

Appears in sequences

• Initial term of a series of exactly n consecutive non-Niven (or Harshad) numbers.at n=33A144378
• a(n) is the number of quadruples (a_1, a_2, a_3, a_4) having all terms in {1,...,n} such that there exists a quadrilateral with these side lengths.at n=17A346636