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A109884
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Indices k of members of A109883 such that A109883(k) is a divisor of k. Also k is a term if A109883(k) = 0.
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4
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1, 2, 4, 6, 8, 10, 12, 16, 18, 24, 28, 30, 32, 40, 44, 48, 60, 64, 72, 84, 120, 126, 128, 136, 140, 150, 152, 180, 184, 204, 216, 224, 234, 256, 270, 360, 420, 440, 462, 468, 496, 512, 520, 528, 546, 672, 700, 750, 752, 864, 870, 884
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OFFSET
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1,2
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COMMENTS
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2^n is a term for all n. All perfect numbers are terms.
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LINKS
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Nathaniel Johnston, Table of n, a(n) for n = 1..463
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EXAMPLE
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18 is a term as A109883(18) = 6, 6 is a divisor of 18.
6 is a term as A109883(6) = 0.
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MAPLE
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for n from 1 to 900 do if(A109883(n)=0 or type(n/A109883(n), integer))then print(n); fi:od: # Nathaniel Johnston, Apr 15 2011
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CROSSREFS
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Cf. A109883, A064510.
Sequence in context: A090778 A097380 A114270 * A015926 A085154 A112421
Adjacent sequences: A109881 A109882 A109883 * A109885 A109886 A109887
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KEYWORD
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easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 11 2005
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EXTENSIONS
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Offset, a(11), and a(12) corrected by, and a(13) - a(52) from Nathaniel Johnston, Apr 15 2011
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STATUS
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approved
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