|
| |
|
|
A058257
|
|
Triangle read by rows: this is a variant of A008280 in which 2 rows go from left to right, 2 from right to left, 2 from left to right, etc.
|
|
3
| |
|
|
1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 3, 2, 1, 0, 0, 0, 3, 5, 6, 6, 6, 0, 0, 3, 8, 14, 20, 26, 71, 71, 71, 68, 60, 46, 26, 0, 413, 342, 271, 200, 132, 72, 26, 0, 0, 0, 413, 755, 1026, 1226, 1358, 1430, 1456, 1456, 1456, 0, 0, 413, 1168, 2194, 3420, 4778, 6208, 7664, 9120, 10576
(list; table; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,11
|
|
|
COMMENTS
| Suggested by first Atkinson reference.
|
|
|
REFERENCES
| M. D. Atkinson: Zigzag permutations and comparisons of adjacent elements, Information Processing Letters 21 (1985), 187-189.
M. D. Atkinson: Partial orders and comparison problems, Sixteenth Southeastern Conference on Combinatorics, Graph Theory and Computing, (Boca Raton, Feb 1985), Congressus Numerantium 47, 77-88.
|
|
|
LINKS
| J. Millar, N. J. A. Sloane and N. E. Young, A new operation on sequences: the Boustrophedon on transform, J. Combin. Theory, 17A 44-54 1996 (Abstract, pdf, ps).
Index entries for sequences related to boustrophedon transform
|
|
|
EXAMPLE
| 1; 0,1; 0,0,1; 1,1,1,0; 3,2,1,0,0; 0,3,5,6,6,6; ...
1
|
|
|
CROSSREFS
| Cf. A058258, A008280, A000111.
Sequence in context: A111541 A105629 A085075 * A083199 A021761 A171839
Adjacent sequences: A058254 A058255 A058256 * A058258 A058259 A058260
|
|
|
KEYWORD
| nonn,easy,tabl,nice
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 06 2000
|
|
|
EXTENSIONS
| More terms from Larry Reeves (larryr(AT)acm.org), Dec 12 2000
|
| |
|
|
