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Search: id:A100748
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| A100748 |
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Years of recorded appearances of Halley's Comet (negative years are B.C.). |
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+0
2
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| -240, -164, -86, -11, 66, 141, 218, 295, 374, 451, 530, 607, 684, 760, 837, 912, 989, 1066, 1145, 1222, 1301, 1378, 1456, 1531, 1607, 1682, 1759, 1835, 1910, 1985
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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This sequence is not well defined for many reasons (negative years are ill-defined; calendars change often, so when does a year begin?; what does "observed" mean?; what if the comet was observed both at the end of one year and at the beginning of another, as in 1985/1986?; etc.). - njas, Jun 24 2007
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LINKS
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Joseph M. Laufer, Halley's Comet, Its 30th Recorded Return, 1985-1986.
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EXAMPLE
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a(30) = 1985 because the 30th recorded appearance of Halley's comet was in 1985.
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CROSSREFS
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See A072235 for another version.
Adjacent sequences: A100745 A100746 A100747 this_sequence A100749 A100750 A100751
Sequence in context: A072173 A015161 A078151 this_sequence A072235 A121378 A135194
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KEYWORD
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sign
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AUTHOR
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David C. Terr (David_C_Terr(AT)raytheon.com), Jan 03 2005
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