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Search: id:A089652
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| A089652 |
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Partial sums, modulo 4, of the sequence : a(1)=1, a(1), a(1), a(1), a(1), a(2), a(2), a(2), a(2), a(3), a(3), a(3), a(3), a(4), ...each terms (not a(1)) repeated 4 times. |
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+0
1
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| 1, 2, 3, 0, 1, 3, 1, 3, 1, 0, 3, 2, 1, 1, 1, 1, 1, 2, 3, 0, 1, 0, 3, 2, 1, 2, 3, 0, 1, 0, 3, 2, 1, 2, 3, 0, 1, 1, 1, 1, 1, 0, 3, 2, 1, 3, 1, 3, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 3, 1, 3, 1, 0, 3, 2, 1, 1, 1, 1, 1, 2, 3, 0, 1, 1, 1, 1, 1, 0, 3, 2, 1, 3, 1, 3, 1, 2, 3, 0, 1, 3, 1, 3, 1
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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A fixed point of the mapping 1->1230, 2->1313, 3->1032, 0->1111.
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MATHEMATICA
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Nest[ Function[ l, {Flatten[(l /. {0 -> {1, 1, 1, 1}, 1 -> {1, 2, 3, 0}, 2 -> {1, 3, 1, 3}, 3 -> {1, 0, 3, 2}})] }], {1}, 4] (from Robert G. Wilson v Mar 04 2005)
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CROSSREFS
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Sequence in context: A014588 A053645 A106730 this_sequence A112168 A072516 A106450
Adjacent sequences: A089649 A089650 A089651 this_sequence A089653 A089654 A089655
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KEYWORD
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easy,nonn
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AUTHOR
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DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Jan 02 2004
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 4 2005
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