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A286562 Transpose of square array A286561. 2

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

%S 1,1,0,1,1,0,1,0,0,0,1,2,1,0,0,1,0,0,0,0,0,1,1,0,1,0,0,0,1,0,1,0,0,0,

%T 0,0,1,3,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,1,2,1,0,1,0,0,0,0,0,1,0,

%U 0,0,0,0,0,0,0,0,0,0,1,2,0,0,0,0,1,0,0,0,0,0,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,1,0,0,0,0,0,0,0

%N Transpose of square array A286561.

%C See A286561 and A286563.

%H Antti Karttunen, <a href="/A286562/b286562.txt">Table of n, a(n) for n = 1..7875; the first 125 antidiagonals of array</a>

%e The top left 16 X 16 corner of the array:

%e n \ k

%e \ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

%e .-----------------------------------------------

%e 1 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

%e 2 | 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4

%e 3 | 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0

%e 4 | 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2

%e 5 | 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0

%e 6 | 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0

%e 7 | 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0

%e 8 | 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1

%e 9 | 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0

%e 10 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0

%e 11 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0

%e 12 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0

%e 13 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0

%e 14 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0

%e 15 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0

%e 16 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1

%e The array is read by descending antidiagonals.

%o (Scheme) (define (A286562 n) (A286561bi (A004736 n) (A002260 n))) ;; For A286561bi see A286561.

%o (Python)

%o def a(n, k):

%o i=1

%o if k==1: return 1

%o while n%(k**i)==0:

%o i+=1

%o return i-1

%o for n in range(1, 21): print [a(k, n - k + 1) for k in range(1, n + 1)][::-1] # _Indranil Ghosh_, May 20 2017

%Y Cf. A286561, A286563.

%K nonn,tabl

%O 1,12

%A _Antti Karttunen_, May 20 2017

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