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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
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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, 26, 24, 27, 25, 30, 28, 31, 29, 34, 32, 35, 33, 38, 36, 39, 37, 42, 40, 43, 41, 46, 44, 47, 45, 50, 48, 51, 49, 54, 52, 55, 53, 58, 56, 59, 57, 62, 60, 63, 61, 66, 64, 67
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 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
| 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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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (1,0,0,1,-1).
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FORMULA
| For n>2, a(n+4k) = a(n) + 4k, with k>=1.
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CROSSREFS
| Cf. A090964.
Sequence in context: A198724 A205112 A173161 * A110237 A189970 A076631
Adjacent sequences: A116465 A116466 A116467 * A116469 A116470 A116471
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KEYWORD
| easy,nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Mar 17 2006
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EXTENSIONS
| Terms corrected by R. J. Mathar, Oct 25 2011
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