A065898 - cp's OEIS frontend

A065898 Which composite number is the product of first n primes (the n-th primorial number)?: a(n) = k such that A002808(k) = A002110(n), or 0 if A002110(n) is not composite.

n	a(n)
1	0
2	2
3	19
4	163
5	1966
6	26781
7	468178
8	9053660
9	210809338
10	6169323433
11	192531847119
12	7161249384065
13	294835346718114
14	12720163581273289
15	599492054060678551
16	31846920298131321838
17	1882691381652701947175
18	115037118886354670022443
19	7718754971134321663159676

[0, 2, 19, 163, 1966, 26781, 468178, 9053660, 210809338, 6169323433, 192531847119, 7161249384065, 294835346718114, 12720163581273289, 599492054060678551, 31846920298131321838, 1882691381652701947175, 115037118886354670022443, 7718754971134321663159676]

cp's OEIS Frontend

A065898 Which composite number is the product of first n primes (the n-th primorial number)?: a(n) = k such that A002808(k) = A002110(n), or 0 if A002110(n) is not composite.

Table of values

List of values