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Search: id:A143716
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| A143716 |
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(0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3,..) becomes (1, 2, 3, 4, 5^6, 8, 9*10, 11, 12^13, 13^14, 15*16, 17, 18^19*20,..). |
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+0
9
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OFFSET
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1,2
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COMMENT
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Why is the 7 left out and the 13 used twice in the definition? Why is 12^13 = 139499305379072 and not 106993205379072 ? [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 21 2009]
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EXAMPLE
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a(5)=5^6=15625.
a(6)=8.
a(7)=9*10=90.
a(8)=11,
a(9)=12^13=139499305379072,
etc.
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CROSSREFS
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Cf. A141287, A141261, A136611.
Sequence in context: A120024 A062929 A038105 this_sequence A107656 A024595 A144804
Adjacent sequences: A143713 A143714 A143715 this_sequence A143717 A143718 A143719
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KEYWORD
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nonn
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Nov 13 2008
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