cp's OEIS Frontend

A170950 Inverse permutation to A170949.

%I A170950 #18 Jun 20 2018 01:36:49
%S A170950 1,3,2,4,7,6,8,5,9,13,12,14,11,15,10,16,21,20,22,19,23,18,24,17,25,31,
%T A170950 30,32,29,33,28,34,27,35,26,36,43,42,44,41,45,40,46,39,47,38,48,37,49,
%U A170950 57,56,58,55,59,54,60,53,61,52,62,51,63,50,64,73,72,74,71,75,70,76,69,77,68,78
%N A170950 Inverse permutation to A170949.
%C A170950 a(A002522(n-1)) = A002061(n); a(A002061(n)) = A174114(n). - _Reinhard Zumkeller_, Mar 08 2010
%C A170950 Row sums are n^3+(n+1)^3 [A005898](1,9,35,91,189,...). - _Vincenzo Librandi_, Feb 22 2010
%C A170950 The even central polygonal numbers divided by 2 give the central column of the triangle. - _Omar E. Pol_, Aug 16 2011
%D A170950 J. H. Conway, Personal communication, Feb 19 2010
%H A170950 R. Zumkeller, <a href="/A170950/b170950.txt">Table of n, a(n) for n = 1..10000</a>
%H A170950 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> [From _Reinhard Zumkeller_, Mar 08 2010]
%e A170950                            1
%e A170950                         3  2  4
%e A170950                      7  6  8  5  9
%e A170950                  13 12 14 11 15 10 16
%e A170950               21 20 22 19 23 18 24 17 25
%e A170950            31 30 32 29 33 28 34 27 35 26 36
%e A170950         43 42 44 41 45 40 46 39 47 38 48 37 49
%e A170950      57 56 58 55 59 54 60 53 61 52 62 51 63 50 64
%e A170950   73 72 74 71 75 70 76 69 77 68 78 67 79 66 80 65 81
%K A170950 nonn,tabf
%O A170950 1,2
%A A170950 _N. J. A. Sloane_, Feb 21 2010