874341

Appears in sequences

• a(n) = n*(n+1)*(2*n+1)*(n^2+n+3)/30.at n=26A061927
• Starting at n, a(n) is the number of times we move away from zero from a negative position 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=30A324686