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Search: id:A144459
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| 1, 24, 77, 160, 273, 416, 589, 792, 1025, 1288, 1581, 1904
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Last digit gives period 10:repeat 1,4,7,0,3,6,9,2,5,8 =A131579(n+7)=b(n), the ten digits.Note b(n+5)-b(n)= period 5: 5,5,-5,5,5. a(n)mod9=period 9:repeat 1,6,5,7,3,2,4,0,8, digits 0 to 8.Compare by three terms to A142069(n+3).
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FORMULA
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a(n+1)=A005563(4),A061037(7),A061039(10),A061041(13),A061043(16),A061045(19),A061047(22),A061049(25), .. . From Lyman,Balmer,Paschen,Brackett,Pfund,Humphreys,Hansen-Strong,.. s-th spectra of hydrogen.
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CROSSREFS
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Sequence in context: A045249 A033572 A048352 this_sequence A124140 A143839 A114818
Adjacent sequences: A144456 A144457 A144458 this_sequence A144460 A144461 A144462
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Oct 08 2008
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