A261712 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

Offset: 1

Author

Reinhard Zumkeller, Aug 31 2015

Keywords

• nonn
• tabf

Comments

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

Examples

			.   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 .
		

Links

• Reinhard Zumkeller, Rows n = 1..20 of triangle, flattened

Crossrefs

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

Programs

Haskell

a261712 n k = a261712_tabf !! (n-1) !! (k-1)
a261712_row n = a261712_tabf !! (n-1)
a261712_tabf = map reverse a261644_tabf