-97222847

Appears in sequences

• a(n+1) = a(n) - n (if n is even), a(n+1) = a(n) * n (if n is odd).at n=17A047907
• a(n+1) = (a(n) - 2*(n-1)) * (2*n-1), where a(1)=1.at n=9A339516