76479

Appears in sequences

• Numbers n such that (i) the sum of the distinct primes dividing n is divisible by the largest prime dividing n and (ii) n has exactly 4 distinct prime factors and (iii) n is squarefree.at n=29A071143
• a(n) is the number of 2 X 2 matrices with entries in {1, ..., n} that are not the product of two 2 X 2 positive integer matrices.at n=17A260550
• a(n) = p*(p - 1)*(73*p^2 - 45*p + 14)/24, where p = prime(n).at n=5A273222