141142

Appears in sequences

• a(n) = n base 5, under morphism f(1) = 121, f(2) = 123, f(3) = 141, f(4) = 142, or 0 if n base 5 has a zero.at n=18A137850
• Even semiprime equivalent to the Euclid-Mullin sequence: a(1) = 4, a(n) = smallest semiprime divisor of product of previous terms plus 2.at n=14A193689
• a(n) = Sum_{k=0..floor(n/3)} (n-2*k)!/(n-3*k)!.at n=21A357532