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

1,3

Comments

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

Links

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

Example

.   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 .

Prog

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

Crossrefs

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

Sequence in context: A137328 A140991 A302191 * A038738 A210741 A208760

Adjacent sequences: A261709 A261710 A261711 * A261713 A261714 A261715

Keyword

nonn,tabf

Author

Reinhard Zumkeller, Aug 31 2015

Status

approved