

A116468


Permutation of natural numbers generated by 2rowed array shown below.


0



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
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OFFSET

1,1


COMMENTS

2 3 6 7 10 11 14 15 ... integers congruent to 2 or 3 mod 4
1 4 5 8 9 12 13 16 ... integers congruent to 0 or 1 mod 4


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


LINKS

Table of n, a(n) for n=1..66.
Index entries for linear recurrences with constant coefficients, signature (1,0,0,1,1).


FORMULA

For n>2, a(n+4k) = a(n) + 4k, with k>=1.
G.f.: x*(2+x2*x^2+5*x^34*x^4+2*x^5)/(1xx^4+x^5).  Philippe Deléham, Dec 02 2016


CROSSREFS

Cf. A090964.
Sequence in context: A263294 A205112 A173161 * A110237 A189970 A076631
Adjacent sequences: A116465 A116466 A116467 * A116469 A116470 A116471


KEYWORD

easy,nonn


AUTHOR

Giovanni Teofilatto, Mar 17 2006


EXTENSIONS

Terms corrected by R. J. Mathar, Oct 25 2011


STATUS

approved



