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0, 1, 2, 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6, 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10, 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14, 12, 13, 14, 15, 13, 14, 15, 16, 14, 15, 16, 17, 15, 16, 17, 18, 16, 17, 18, 19, 17, 18, 19, 20, 18, 19, 20, 21, 19, 20, 21
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| Also array read by rows, with four columns, in which row n lists n, n+1, n+2, n. - Omar E. Pol, Jan 22 2012
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index to sequences with linear recurrences with constant coefficients, signature (1,0,0,1,-1).
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FORMULA
| A110658(n) = A028242(a(n)) = a(A028242(n)).
a(n) = floor(n/4) + (n mod 4) mod 3.
G.f.: x*(1+x-2*x^2+x^3)/((1+x)*(1+x^2)*(1-x)^2). a(n) = (1/8)*(2*n-6*(-1)^(n*(n+1)/2)+3*(-1)^n+3). - Bruno Berselli, Sep 28 2011
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EXAMPLE
| Contribution from Omar E. Pol, Jan 22 2012 (Start):
Array begins:
0, 1, 2, 0;
1, 2, 3, 1;
2, 3, 4, 2;
3, 4, 5, 3;
4, 5, 6, 4;
5, 6, 7, 5;
6, 7, 8, 6;
7, 8, 9, 7;
(End)
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PROG
| (MAGMA) [Integers()!(2*n-6*(-1)^(n*(n+1)/2)+3*(-1)^n+3)/8: n in [0..81]]; // Bruno Berselli, Sep 28 2011
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CROSSREFS
| Cf. A007892, A110655.
Sequence in context: A071486 A046695 A071433 * A071512 A080018 A079686
Adjacent sequences: A110654 A110655 A110656 * A110658 A110659 A110660
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KEYWORD
| nonn,tabf,easy
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 05 2005
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