-6460

Appears in sequences

• Expansion of (1-4*x)^(19/2).at n=3A020931
• Starting at n, a(n) is the difference of the number of times we revisit spots coming from positive spots and the number of times we revisit spots coming from negative spots according to the following rules. On the k-th step (k=1,2,3,...) move a distance of k in the direction of zero. If the number landed on has been landed on before, move a distance of k away.at n=61A324685