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Search: id:A076031
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| A076031 |
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Group the natural numbers so that the n-th group contains the smallest still-available set of n numbers whose product is a square. |
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+0
12
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| 1, 2, 8, 3, 4, 12, 5, 6, 7, 210, 9, 10, 11, 13, 1430, 14, 15, 16, 17, 18, 1785, 19, 20, 21, 22, 23, 24, 168245, 25, 26, 27, 28, 29, 30, 31, 409045, 32, 33, 34, 35, 36, 37, 38, 39, 119629510, 40, 41, 42, 43, 44, 45, 46, 47, 48, 293493662, 49, 50, 51, 52
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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There is some ambiguity in the definition. Exactly how is the next term to be chosen? Compare A076596, A076696. - njas, May 20 2003
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EXAMPLE
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1; 2,8; 3,4,12; 5,6,7,210; 9,10,11,13,1430; 14,15,16,17,18,1785; ...
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CROSSREFS
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Cf. A076027, A076028, A076029, A076030.
Sequence in context: A021357 A016640 A083486 this_sequence A076596 A081967 A076099
Adjacent sequences: A076028 A076029 A076030 this_sequence A076032 A076033 A076034
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KEYWORD
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nonn,tabl
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 01 2002
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EXTENSIONS
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Corrected and extended by Hans Havermann (pxp(AT)rogers.com), Nov 09, 2002.
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