70187

Appears in sequences

• a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once.at n=19A143192
• Expansion of Product_{k>=1} 1/(1 - A000009(k)*x^k).at n=23A270995
• a(1)=1, a(n)=a(n-1) plus the second prime greater than a(n-1).at n=14A289217