427020

Appears in sequences

• Number of lines through at least 2 points of an n X n grid of points.at n=37A018808
• Numbers m such that the concatenation of m with m+4 gives a square.at n=9A115437
• Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 6.at n=13A116125
• Numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 2.at n=8A116177