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%I #11 Feb 14 2015 21:30:56
%S 0,1,3,2,6,5,4,11,10,9,8,7,20,19,18,17,16,15,14,13,12,36,35,34,33,32,
%T 31,30,29,28,27,26,25,24,23,22,21,65,64,63,62,61,60,59,58,57,56,55,54,
%U 53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,118
%N Simple self-inverse permutation of natural numbers: after zero, list each block of A255071(n) numbers in reverse order, from A255061(n+1) to A255062(n).
%C Maps between A255056 and A255066. (Equally, between A255057 and A255067.)
%H Antti Karttunen, <a href="/A255122/b255122.txt">Table of n, a(n) for n = 0..721</a>
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%F a(n) = A255061(1+A255121(n)) - A255120(n).
%o (Scheme) (define (A255122 n) (- (A255061 (+ 1 (A255121 n))) (A255120 n)))
%Y Cf. A255061, A255062, A255071, A255120, A255121.
%Y Cf. A255056, A255057, A255066, A255067.
%Y Similar permutations: A218602, A230432.
%K nonn
%O 0,3
%A _Antti Karttunen_, Feb 14 2015
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