231930

Appears in sequences

• Number of binary words of length n containing at least one subword 10001 and no subwords 10^{i}1 with i<3.at n=38A143283
• On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that a (1,n) leaper reaches before getting trapped, or -1 if it never gets trapped.at n=15A323471