A090298 - OEIS

%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