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A199801
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Primitive elements of A060355: n such that n and n+1 are powerful but n is not of the form 4m(m+1) where m and m+1 are powerful.
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2
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8, 675, 9800, 12167, 235224, 465124, 11309768, 4931691075, 5425069447, 13051463048, 8192480787000, 11968683934831, 15061377048200, 28821995554247
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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8 and 9 are powerful and although 8 = 4*1*(1+1), 1+1 is not powerful so 8 is in this sequence.
288 and 289 are powerful but 288 = 4*8*(8+1) and both 8 and 8+1 are powerful so 288 is not in this sequence.
675 and 676 are powerful and 675 is not of the form 4m(m+1) so 675 is in this sequence.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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