A080388 a(n)=GCD[A001405(n+1), A001405(n)], greatest common divisor of 2 consecutive central binomial coefficients.

1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 6, 1, 2, 3, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 4, 1, 30, 1, 1, 3, 2, 5, 6, 1, 2, 3, 10, 1, 6, 1, 4, 15, 2, 1, 6, 1, 2, 3, 4, 1, 2, 1, 28, 1, 2, 1, 4, 1, 2, 7, 1, 1, 6, 1, 2, 3, 14, 1, 2, 1, 2, 1, 4, 7, 2, 1, 10, 1, 2, 1, 84, 5, 2, 3, 4, 1, 90, 7, 4, 3, 2, 5, 6, 1, 2, 9, 4, 1, 6