A226768 Least prime in a string of exactly n consecutive primes all differing by 3-almost primes (A014612).

2, 89, 199, 4679, 1499, 24593, 118801, 318569, 1055741, 2253311, 3695513, 4559983, 22790969, 29625383, 85780433, 108547289, 1092631789, 520956851, 23522240041, 11229387053, 50466176303, 325923513479, 57958489439, 537724352057, 932937059897, 1970378236613, 12522644028841

Offset

1,1

Comments

a(28) > 4*10^13.

Links

Table of n, a(n) for n=1..27.

Example

a(3) = 199 since (199, 211, 223) is the first triple (which cannot be extended to a quadruplet) of consecutive primes whose first differences are 3-almost primes, 211-199 = 223-211 = 2^2*3.

Crossrefs

Cf. A220697, A226769, A226840.

Sequence in context: A249305 A023302 A041967 * A246871 A024239 A338734

Adjacent sequences: A226765 A226766 A226767 * A226769 A226770 A226771

Keyword

nonn

Author

Giovanni Resta, Jun 17 2013

Status

approved