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%I #6 Mar 30 2012 18:39:59
%S 1,7,2,11,6,3,13,10,5,4,19,14,9,8,23,18,15,12,25,22,17,16,31,26,21,20,
%T 35,30,27,24,37,34,29,28,43,38,33,32,47,42,39,36,49,46,41,40,55,50,45,
%U 44,59,54,51,48,61,58,53,52,67,62,57,56,71,66,63,60,73,70,65,64,79,74
%N Permutation of natural numbers generated by 4-rowed array shown below.
%C 1 7 11 13 19 23 25 31 35 37 43 47 ...
%C 2 6 10 14 18 22 26 30 34 38 42 46 ...
%C 3 5 9 15 17 21 27 29 33 39 41 45 ...
%C 4 8 12 16 20 24 28 32 36 40 44 48 ...
%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
%Y Cf. A088520, A090298, A092260, A113807.
%K easy,nonn
%O 1,2
%A _Giovanni Teofilatto_, Jan 24 2004
%E Corrected and extended by _Ray Chandler_, Jan 30 2004
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