A103891 Smallest prime factor of prime(n)! / prime(n)# + 1.

2, 2, 5, 5, 11, 7, 19, 31, 27893, 223, 554797, 10333, 29, 61, 28652131, 293049347, 7731517, 1483, 73, 337809273983, 67, 440939, 1321, 94099, 89, 107, 281, 1908113757161297657, 479, 61, 167, 3121, 177907, 5039, 11519, 281, 612153149, 587, 2753, 21491, 2897, 97, 307

Offset

1,1

Links

Table of n, a(n) for n=1..43.

Reinhard Zumkeller, prime(n)!/prime(n)#+1

Formula

a(n) = A020639(A103890(n)).

Crossrefs

Cf. A020639, A103856, A103890, A103892.

Sequence in context: A171967 A079964 A184321 * A265257 A005294 A052943

Adjacent sequences: A103888 A103889 A103890 * A103892 A103893 A103894

Keyword

nonn

Author

Reinhard Zumkeller, Feb 20 2005

Extensions

a(28)-a(30) from Amiram Eldar, Feb 13 2020

More terms from Jinyuan Wang, Apr 16 2020

Status

approved