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A124941 Numbers n such that n and n+4 are 4-almost primes. +0
5
36, 56, 84, 100, 132, 136, 152, 228, 340, 344, 372, 376, 472, 484, 488, 532, 546, 564, 568, 580, 621, 632, 686, 708, 770, 804, 808, 820, 846, 852, 856, 868, 872, 950, 1012, 1192, 1204, 1206, 1208, 1274, 1304, 1326, 1336, 1444, 1524, 1550, 1572, 1576, 1690 (list; graph; listen)
OFFSET

1,1

EXAMPLE

36=2^2*3^2, 40=2^3*5; 56=2^3*7, 60=2^2*3*5.

CROSSREFS

Cf. A124940, A124942.

Sequence in context: A033701 A132956 A050691 this_sequence A116321 A080469 A066505

Adjacent sequences: A124938 A124939 A124940 this_sequence A124942 A124943 A124944

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Nov 13 2006

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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