223092871

Appears in sequences

• Euclid numbers: 1 + product of the first n primes.at n=9A006862
• Composite Euclid numbers: numbers of the form p# + 1, where p# denotes the primorial of the prime p.at n=3A066576
• Smallest composite number == 1 mod first n prime numbers.at n=8A075064
• Smallest composite number which is 1 more than the product of n distinct primes.at n=8A081548
• Semiprimes of the form primorial(k) + 1.at n=2A104877
• Triangle read by rows: the n-th Euclid number followed by the first n primes and 1.at n=54A162387
• a(n) is the smallest number k such that phi(k) >= n*phi(k-1).at n=5A266269
• Primorial base log-function: fully additive with a(p) = p#/p, where p# = A034386(p).at n=57A276085
• Triangle read by rows: T(n,k) = A002110(n) + A002110(k), 0 <= k <= n; sums of two primorials, not necessarily distinct.at n=45A370121
• a(n) = A276085(A048103(n)), where A276085 is the primorial base log-function, and A048103 is the range of the primorial base exp-function (A276086).at n=41A376413
• a(n) is the smallest semiprime > primorial(n).at n=8A379407