

A054804


First term of strong prime quartets: prime(m+1)prime(m) > prime(m+2)prime(m+1) > prime(m+3)prime(m+2).


19



31, 61, 89, 211, 271, 293, 449, 467, 607, 619, 709, 743, 839, 863, 919, 1069, 1291, 1409, 1439, 1459, 1531, 1637, 1657, 1669, 1723, 1759, 1777, 1831, 1847, 1861, 1979, 1987, 2039, 2131, 2311, 2357, 2371, 2447, 2459, 2477, 2503, 2521, 2557, 2593, 2633
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OFFSET

1,1


COMMENTS

First member of pairs of consecutive primes in A051634 ("strong primes").  M. F. Hasler, Oct 27 2018


LINKS

Robert Israel, Table of n, a(n) for n = 1..10000


MAPLE

primes:= select(isprime, [seq(i, i=3..10000, 2)]):
L:= primes[2..1]primes[1..2]:
primes[select(t > L[t+2] < L[t+1] and L[t+1] < L[t], [$1..nops(L)2])]; # Robert Israel, Jun 28 2018


CROSSREFS

Cf. A051634, A054800A054840.
Sequence in context: A095672 A073650 A078562 * A128470 A195744 A326896
Adjacent sequences: A054801 A054802 A054803 * A054805 A054806 A054807


KEYWORD

nonn


AUTHOR

Henry Bottomley, Apr 10 2000


STATUS

approved



