120312

Appears in sequences

• a(n) = floor( a(n-1)/a(1) + a(n-3)/a(3) + a(n-5)/a(5) + ... ), for n >= 3 with a(1) = 1 and a(2) = 3.at n=42A022877
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,0,3.at n=5A037694
• Number of (undirected) paths in the n-book graph.at n=30A307921