A259224 Initial primes in sets of 4 consecutive primes with common gap 54.

400948369, 473838319, 583946599, 678953059, 816604199, 972598819, 1136526949, 1466715139, 1475790529, 1499794999, 1502149559, 1610895679, 1643313869, 1673057219, 1686181579, 1845792019, 1867046639, 1907478889, 1992202439, 2011077869, 2030490479, 2207714969

Offset

1,1

Comments

All terms are == {19,29} mod 30.

Links

Lars Blomberg, Table of n, a(n) for n = 1..10000 (The first 102 terms from Zak Seidov)

Prog

(PARI) A259224(n, p=2, v=1, g=54, c, o)={forprime(q=p+1, , if(p+g!=p=q, next, q!=o+2*g, c=2, c++>3, v&& print1(o-g", "); n--||break); o=q-g); o-g} \\ Can be used as next(p)=A259224(1, p+1) to get the next term, e.g.:
p=0; A259224_vec=vector(10, i, p=A259224(1, p+1)) \\ Will be slow! - M. F. Hasler, Oct 26 2018

Crossrefs

Start of CPAP-4 with given common difference (in square brackets): A033451 [6], A033447 [12], A033448 [18], A052242 [24], A052243 [30], A058252 [36], A058323 [42], A067388 [48], A259224 [this: 54], A210683 [60].

Subsequence of A054800: start of a CPAP-4 with arbitrary common difference.

Sequence in context: A172602 A108212 A103124 * A038132 A101770 A323537

Adjacent sequences: A259221 A259222 A259223 * A259225 A259226 A259227

Keyword

nonn

Author

Zak Seidov, Jun 21 2015

Status

approved