5429329domain: NAppears in sequencesBrilliant numbers (A078972) whose digit reversal is a pentagonal number (A000326).at n=25A115679Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 0), (-1, 1, 1), (0, -1, 0), (1, 1, 0)}.at n=13A149241