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Search: id:A060472
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| A060472 |
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Smallest positive a(n) such that number of solutions to a(n)=a(j)+a(k) j<k<n is four or less. |
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4
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| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 23, 25, 27, 29, 31, 36, 38, 40, 42, 44, 51, 53, 55, 57, 64, 66, 68, 70, 72, 77, 79, 81, 83, 85, 92, 94, 96, 98, 105, 107, 109, 111, 118, 120, 122, 124, 126, 131, 133, 135, 137, 139, 146, 148, 150, 152, 159, 161, 163
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Numbers {1,3,10,12,14,16,18,23,25,27,29,31,38,40,42,44,51,53} mod 54 plus {2,4,5,6,7,8,9,20,36}.
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EXAMPLE
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12 is in the sequence since it is 5+7, 4+8, 3+9 and 2+10 but no other sum of two distinct terms.
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CROSSREFS
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Cf. A033627, A060469, A060470, A060471, A060472.
Sequence in context: A083292 A122618 A033062 this_sequence A130514 A130232 A103969
Adjacent sequences: A060469 A060470 A060471 this_sequence A060473 A060474 A060475
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Mar 15 2001
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