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A157934 Numbers m such that m^2+1 is prime and m^2-7 = prevprime(m^2) (= A007917(m^2)). 1
54, 66, 90, 156, 240, 270, 306, 474, 570, 576, 636, 750, 780, 1080, 1320, 1350, 2034, 2154, 2406, 2700, 2760, 3204, 3240, 3306, 3480, 3516, 3756, 3774, 3984, 4056, 4086, 4140, 4146, 4176, 4716, 4734, 4794, 5154, 5370, 5424, 5550, 5664, 5700, 5850, 5856 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The corresponding primes are listed in A157183 resp. A157935.

LINKS

Table of n, a(n) for n=1..45.

PROG

(PARI) forstep(m=2, 9999, 2, isprime(m^2+1) & precprime(m^2)==m^2-7 & print1(m, ", "))

CROSSREFS

Cf. A157183, A028883, A028882, A005574, A157935.

Sequence in context: A088489 A025331 A025323 * A281920 A005129 A039532

Adjacent sequences:  A157931 A157932 A157933 * A157935 A157936 A157937

KEYWORD

nonn

AUTHOR

M. F. Hasler, Mar 18 2009

STATUS

approved

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Last modified November 20 06:06 EST 2018. Contains 317385 sequences. (Running on oeis4.)