145145

Appears in sequences

• Odd integers m such that phi(m) | sigma(m).at n=34A015715
• n*(n-1)*(n-2)*(n-3)*(n-4)*(2*n-1)/72.at n=15A055504
• Numbers n such that sigma(n) = 3*phi(n).at n=11A068391
• Balanced numbers k such that k mod 12 = 5.at n=1A110598
• Partial sums of A100119. Sum of first n of the n-th centered n-gonal numbers.at n=32A130218
• Number of (w,x,y,z) with all terms in {1,...,n} and w > x < y >= z.at n=29A212501
• Number of (n+1) X (1+1) 0..3 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..3 introduced in row major order.at n=11A231356
• Numbers such that the sum of prime factors without repetition divides the product of prime factors without repetition and each division yields a greater quotient.at n=28A380487