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%I #18 Nov 24 2016 11:35:32
%S 1,9,2,11,8,3,19,12,7,4,21,18,13,6,5,29,22,17,14,10,31,28,23,16,15,39,
%T 32,27,24,20,41,38,33,26,25,49,42,37,34,30,51,48,43,36,35,59,52,47,44,
%U 40,61,58,53,46,45,69,62,57,54,50,71,68,63,56,55,79,72,67,64,60,81,78
%N Permutation of natural numbers generated by 5-row array shown below.
%C 1 9 11 19 21 29 31 39... (A090771)
%C 2 8 12 18 22 28 32 38... (A090772)
%C 3 7 13 17 23 27 33 37... (A063226)
%C 4 6 14 16 24 26 34 36... (A090773)
%C 5 10 15 20 25 30 35 40... (A008587, excluding initial term)
%C -----------------------------------------------------------
%C For such arrays A_k, here A_5, see a W. Lang comment on A113807, the A_7 case. However, in order to obtain A_5 one should take the last row as the first one after adding a 0 in front (thus getting a permutation of the nonnegative integers). - _Wolfdieter Lang_, Feb 02 2012
%Y Cf. A088520, A090243, A092260, A113807.
%K easy,nonn
%O 1,2
%A _Giovanni Teofilatto_, Jan 25 2004
%E More terms from _Ray Chandler_, Feb 01 2004
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