editing

approved

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

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

Reinhard Zumkeller, <a href="/A261712/b261712.txt">Table of n, a(n) for Rows n = 1..12622420 of triangle, flattened</a>

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

. ----+------------------------------------------------------+-----------

. 1 | 1 | 1

. 2 | 1 | 1

. 3 | 3 | 1

. 4 | 1,5,8 | 3

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

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

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

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

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

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

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

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

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

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

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

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

(Haskell)

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

a261712_row n = a261712_tabf !! (n-1)

a261712_tabf = map reverse a261644_tabf

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

nonn,changed,tabf

allocated for Reinhard Zumkeller Reversed rows of A261644, seen as table read by rows.

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, 44, 47, 52, 57, 60, 63, 2, 6, 10, 15, 24, 29, 33, 40, 47, 52, 57, 62, 66, 70, 77, 81, 85, 88, 91, 99, 105, 108, 111, 116, 121, 124, 127, 4, 12, 20, 25, 30, 34, 38

1,3

Reinhard Zumkeller, <a href="/A261712/b261712.txt">Table of n, a(n) for n = 1..126224</a>

allocated

nonn

Reinhard Zumkeller, Aug 31 2015

approved

editing

allocated for Reinhard Zumkeller

allocated

approved