445544

Appears in sequences

• Palindromes of form k*(k+7).at n=6A028565
• Starting at n, a(n) is the total number of negative positions visited 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 from zero instead.at n=17A324665