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Search: id:A116468
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| A116468 |
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Permutation of natural numbers generated by 2-rowed array shown below. |
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+0
1
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| 2, 3, 1, 6, 4, 7, 5, 10, 8, 11, 9, 14, 12, 15, 13, 18, 16, 19, 17, 22, 20, 23, 21, 24, 26, 27, 25, 30, 28, 31, 29, 34, 32, 35, 33, 38, 36, 39, 37, 42, 40, 41, 43, 46, 44, 47, 45, 50, 48, 51, 49, 54, 52, 55, 53, 58, 56, 59, 57, 62, 60, 63, 61, 66, 64, 67, 65
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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2 3 6 7 10 11 14 15 ...a(n)=congruent to 2 or 3 mod 4
1 4 5 8 9 12 13 16 ...a(n)=congruent to 0 or 1 mod 4
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REFERENCES
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M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
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FORMULA
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For n>2, a(n+4k) = a(n) + 4k, with k>=1.
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CROSSREFS
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Cf. A090964.
Sequence in context: A166295 A016730 A114576 this_sequence A110237 A076631 A035485
Adjacent sequences: A116465 A116466 A116467 this_sequence A116469 A116470 A116471
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Mar 17 2006
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