1911029760

Appears in sequences

• Number of 3-fold-free subsets of {1, 2, ..., n}.at n=35A050293
• Eighth column of triangle A067417.at n=7A067423
• a(1) = 1, a(n+1)= a(n)*(n+1) divided by the largest prime divisor of n+1.at n=26A076928
• Product of all composite numbers from 1 to the n-th nonprime number divided by product of all the prime divisors of each of those composite numbers which exceed the previously stated value.at n=16A084744
• a(1) = 1, a(2) = 2 and a(n) = product of the nonzero digits of all previous terms.at n=8A091788