

A126721


Primes p such that qp = 40, where q is the next prime after p.


7



19333, 20809, 22573, 25261, 33247, 38461, 45013, 48907, 52321, 60169, 60961, 62233, 62989, 64333, 64513, 69499, 73141, 76039, 83137, 83497, 84589, 86029, 88129, 88339, 88681, 90313, 96097, 97327, 110989, 113287, 117577, 121189, 122611, 125551, 130729, 131797, 135937, 137659, 139201
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OFFSET

1,1


COMMENTS

From Zak Seidov: First terms followed by gaps 40, 2, 40: (383179, 1269601, 1528897, ...). First term followed by gaps 40, 2, 40, 2, 40 is 13504819.  M. F. Hasler, Oct 29 2018


LINKS

Remi Eismann, Table of n, a(n) for n = 1..10000
Index entries for primes, gaps between


MAPLE

a:=p>`if`(ithprime(p+1)ithprime(p)=40, ithprime(p), NULL); seq(a(p), p=1..13000); # Muniru A Asiru, Oct 29 2018


MATHEMATICA

Transpose[Select[Partition[Prime[Range[11000]], 2, 1], #[[2]]#[[1]] == 40&]][[1]] (* Harvey P. Dale, Apr 18 2012 *)


PROG

(PARI) A(N=100, g=40, p=2, i=primepi(p)1, L=[])={forprime(q=1+p, , i++; if(p+g==p=q, L=concat(L, qg); Nbreak)); L} \\ returns the list of first N terms of the sequence.  M. F. Hasler, Oct 19 2018


CROSSREFS

Sequence in context: A280555 A031831 A252901 * A323558 A321642 A204592
Adjacent sequences: A126718 A126719 A126720 * A126722 A126723 A126724


KEYWORD

nonn


AUTHOR

Rémi Eismann, Feb 13 2007


STATUS

approved



