14684560

Appears in sequences

• Number of permutations of [n] having exactly 1 circular succession. A circular succession in a permutation p of [n] is either a pair p(i), p(i+1), where p(i+1)=p(i)+1 or the pair p(n), p(1) if p(1)=p(n)+1.at n=10A180189
• a(0)=0, a(n) = (a(n-1) XOR n) * (n+1).at n=10A182437