662676

Appears in sequences

• The number of bidirectional ballot sequences of length n, i.e., the number of 0-1 sequences of length n such that every prefix and every suffix has more 1's than 0's.at n=25A167510
• Minimum perimeter of n-tuples of Heronian triangles with equal perimeter and equal area.at n=10A198311
• Expansion of 1/(1 - 49*x)^(2/7).at n=4A386271