54815

Appears in sequences

• Non-palindromic numbers n such that phi(n) = phi(reversal(n)).at n=33A097647
• Solutions y of the Mordell equation y^2 = x^3 - 3a^2 + 1 for a = 0,1,2, ... (solutions x are given by the sequence A000466).at n=19A173202
• Number of interior vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) square grid.at n=22A331767