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Search: id:A105353
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| A105353 |
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Rearrangement of positive integers: parity of a(n) coincides with parity of n-th digit of decimal expansion of pi (see comments). |
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+0
8
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| 1, 3, 2, 5, 7, 4, 9, 11, 13, 6, 8, 15, 17, 19, 10, 21, 23, 25, 27, 12, 29, 14, 16, 18, 20, 22, 24, 31, 33, 26, 35, 28, 37, 39, 41, 30, 32, 34, 36, 38, 43, 45, 47, 49, 40, 51, 53, 55, 57, 59, 61, 63, 65, 42, 67, 44, 46, 48, 69, 71, 50, 73, 52, 54, 75, 77, 56, 79, 58, 81, 60, 83
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Take decimal expansion of pi: 3,1,4,1,5,9,2,6,5,... First digit pi(1)=3, hence a(1)=1; pi(2)=1, hence a(2)=3, pi(3)=4, hence a(3)=2, etc.
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CROSSREFS
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Cf. A105354 - A105360.
Sequence in context: A130295 A006369 A097284 this_sequence A115966 A069196 A108918
Adjacent sequences: A105350 A105351 A105352 this_sequence A105354 A105355 A105356
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KEYWORD
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nonn,base
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Apr 01 2005
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