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A076580
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Triangular numbers which are 6-almost primes.
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1
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528, 1176, 4656, 4950, 5460, 6216, 7140, 7260, 7875, 11628, 13041, 14196, 15576, 17766, 17955, 19110, 20100, 21736, 24976, 26796, 28680, 28920, 31878, 33930, 34980, 37950, 44850, 45150, 46056, 46360, 49770, 56616, 58653, 58996, 59340
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(1)=528, 528 is a triangular number and 528=2*2*2*2*3*11 i.e. is a product of 6 prime factors so is 6-almost prime.
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MATHEMATICA
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Select[Accumulate[Range[400]], PrimeOmega[#]==6&] (* Harvey P. Dale, May 19 2019 *)
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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STATUS
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approved
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