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A285733 Transpose of square array A285732. 3

%I #14 Dec 07 2019 12:18:29

%S -1,1,1,3,-2,2,6,2,3,4,10,5,-3,5,7,15,9,4,6,8,11,21,14,8,-4,9,12,16,

%T 28,20,13,7,10,13,17,22,36,27,19,12,-5,14,18,23,29,45,35,26,18,11,15,

%U 19,24,30,37,55,44,34,25,17,-6,20,25,31,38,46,66,54,43,33,24,16,21,26,32,39,47,56,78,65,53,42,32,23,-7,27,33,40,48,57,67

%N Transpose of square array A285732.

%C See A285732.

%H Antti Karttunen, <a href="/A285733/b285733.txt">Table of n, a(n) for n = 1..7260; the first 120 antidiagonals of the array</a>

%F A(n,k) = A285732(k,n) = A285723(n,k) - A286100(n,k).

%e The top left 9 X 9 corner of the array:

%e -1, 1, 3, 6, 10, 15, 21, 28, 36

%e 1, -2, 2, 5, 9, 14, 20, 27, 35

%e 2, 3, -3, 4, 8, 13, 19, 26, 34

%e 4, 5, 6, -4, 7, 12, 18, 25, 33

%e 7, 8, 9, 10, -5, 11, 17, 24, 32

%e 11, 12, 13, 14, 15, -6, 16, 23, 31

%e 16, 17, 18, 19, 20, 21, -7, 22, 30

%e 22, 23, 24, 25, 26, 27, 28, -8, 29

%e 29, 30, 31, 32, 33, 34, 35, 36, -9

%o (Scheme) (define (A285733 n) (A285732bi (A004736 n) (A002260 n))) ;; For A285732bi see under A285732.

%o (Python)

%o def T(n, m): return ((n + m)**2 - n - 3*m + 2)/2

%o def A(n, k): return -n if n == k else T(n - k, k) if n>k else T(n, k - n)

%o for n in range(1, 21): print [A(n - k + 1, k) for k in range(1, n + 1)] # _Indranil Ghosh_, May 03 2017

%Y Transpose: A285732.

%Y Cf. A285723, A286100.

%K sign,tabl

%O 1,4

%A _Antti Karttunen_, May 03 2017

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Last modified April 25 07:41 EDT 2024. Contains 371964 sequences. (Running on oeis4.)