930028

Appears in sequences

• 'Reverse and Add!' trajectory of 1997.at n=5A063054
• n sets a new record for the number of integers k such that k is not of the form m + reverse(m) for any m and n occurs in the 'Reverse and Add' trajectory of k (cf. A067284).at n=31A067287
• Triangular polyominoes (or polyiamonds) with n cells at most (turning over is allowed, holes are allowed, must be connected along edges).at n=16A130867