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 A261712 Reversed rows of A261644, seen as table read by rows. 5

%I #4 Aug 31 2015 02:52:16

%S 1,1,3,1,5,8,1,5,9,12,15,3,8,13,20,25,28,31,3,8,13,17,24,29,33,37,41,

%T 44,47,52,57,60,63,2,6,10,15,24,29,33,40,47,52,57,62,66,70,77,81,85,

%U 88,91,99,105,108,111,116,121,124,127,4,12,20,25,30,34,38

%N Reversed rows of A261644, seen as table read by rows.

%C T(n+1,k) = T(n,k) for k = 1 .. A261727(n).

%H Reinhard Zumkeller, <a href="/A261712/b261712.txt">Rows n = 1..20 of triangle, flattened</a>

%e . n | T(n,*) | A261646(n)

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

%e . 1 | 1 | 1

%e . 2 | 1 | 1

%e . 3 | 3 | 1

%e . 4 | 1,5,8 | 3

%e . 5 | 1,5,9,12,15 | 5

%e . 6 | 3,8,13,20,25,28,31 | 7

%e . 7 | 3,8,13,17,24,29,33,37,41,44,47,52,57,60,63 | 15

%e . 8 | 2,6,10,15,24,29,33,40,47,52,57,62,66,70,77,81,85,... | 27

%e . 9 | 4,12,20,25,30,34,38,47,52,57,62,66,70,77,84,91,... | 49

%e . 10 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 90

%e . 11 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 171

%e . 12 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 326

%e . 13 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 613

%e . 14 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 1174

%e . 15 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 2255

%e . 16 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 4333 .

%o a261712 n k = a261712_tabf !! (n-1) !! (k-1)

%o a261712_row n = a261712_tabf !! (n-1)

%o a261712_tabf = map reverse a261644_tabf

%Y Cf. A261644, A261646 (row lengths), A261727.

%K nonn,tabf

%O 1,3

%A _Reinhard Zumkeller_, Aug 31 2015

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Last modified August 13 10:15 EDT 2024. Contains 375130 sequences. (Running on oeis4.)