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A320712 Indices of primes followed by a gap (distance to next larger prime) of 28. 1
429, 462, 685, 781, 1116, 1231, 1274, 1288, 1327, 1392, 1585, 1708, 1710, 1891, 1944, 2065, 2154, 2367, 2417, 2606, 2663, 2729, 2980, 3012, 3069, 3227, 3519, 3653, 3990, 4018, 4168, 4196, 4595, 4603, 4618, 4797, 4856, 4867, 5123, 5191, 5294, 5375, 5432, 5476, 5498, 5593, 5627, 5688, 5703 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Indices of the primes listed in A124595.

LINKS

Table of n, a(n) for n=1..49.

Index entries for primes, gaps between.

FORMULA

a(n) = A000720(A124595(n)).

A320712 = { i > 0 | prime(i+1) = prime(i) + 28 }.

PROG

(PARI) A(N=100, g=28, p=2, i=primepi(p)-1, L=List())={forprime(q=1+p, , i++; if(p+g==p=q, listput(L, i); N--||break)); Vec(L)} \\ returns the list of first N terms of the sequence

CROSSREFS

Equals A000720 o A124595.

Indices of 28's in A001223.

Row 14 of A174349.

Cf. A029707, A029709, A320701, A320702, ..., A320720 (analog for gaps 2, 4, 6, 8, ..., 44), A116493 (gap 70), A116496 (gap 100), A116497 (gap 200), A116495 (gap 210).

Sequence in context: A177328 A243833 A334558 * A338344 A203612 A250330

Adjacent sequences:  A320709 A320710 A320711 * A320713 A320714 A320715

KEYWORD

nonn

AUTHOR

M. F. Hasler, Oct 19 2018

STATUS

approved

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Last modified September 25 15:27 EDT 2021. Contains 347658 sequences. (Running on oeis4.)