A167597 The isolated nonprimes that are the sum of two successive primes.

12, 18, 30, 42, 60, 138, 198, 240, 462, 600, 618, 810, 828, 882, 1230, 1290, 1320, 1428, 1482, 1620, 1668, 1722, 1878, 2088, 2112, 2688, 2970, 3330, 3390, 3768, 4002, 4092, 4242, 4260, 4482, 4518, 5100, 5280, 5418, 5502, 5520, 5652, 6090, 6198, 6300, 6450

Offset

1,1

Links

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

Formula

A001043 INTERSECT A014574. [R. J. Mathar, May 30 2010]

Maple

N:= 10000: # to get all terms <= N
Primes:= select(isprime, [seq(i, i=3..N+1, 2)]):
A001043:= convert(Primes[1..-2] + Primes[2..-1], set):
Primes:= convert(Primes, set):
A:= map(`+`, Primes intersect map(`-`, Primes, 2), 1) intersect A001043:
sort(convert(A, list)); # Robert Israel, Jan 18 2016

Crossrefs

Cf. A001043, A001097.

Sequence in context: A225576 A275082 A256753 * A138636 A075281 A171179

Adjacent sequences: A167594 A167595 A167596 * A167598 A167599 A167600

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 07 2009

Extensions

Corrected (60 inserted, 178 replaced by 198, 462 inserted....) by R. J. Mathar, May 30 2010

Status

approved