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%I #12 Dec 02 2016 14:32:52
%S 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,
%T 25,30,28,31,29,34,32,35,33,38,36,39,37,42,40,43,41,46,44,47,45,50,48,
%U 51,49,54,52,55,53,58,56,59,57,62,60,63,61,66,64,67
%N Permutation of natural numbers generated by 2-rowed array shown below.
%C 2 3 6 7 10 11 14 15 ... integers congruent to 2 or 3 mod 4
%C 1 4 5 8 9 12 13 16 ... integers congruent to 0 or 1 mod 4
%D M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
%D Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,1,-1).
%F For n>2, a(n+4k) = a(n) + 4k, with k>=1.
%F G.f.: x*(2+x-2*x^2+5*x^3-4*x^4+2*x^5)/(1-x-x^4+x^5). - _Philippe Deléham_, Dec 02 2016
%Y Cf. A090964.
%K easy,nonn
%O 1,1
%A _Giovanni Teofilatto_, Mar 17 2006
%E Terms corrected by _R. J. Mathar_, Oct 25 2011
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