46179

Appears in sequences

• Composite numbers with four prime factors (not necessarily distinct) whose concatenation yields a palindrome.at n=18A046453
• Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant = 1 (mod 3).at n=19A211034
• a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} phi(i*j*k) / phi(j*k).at n=17A372663