|
Search: id:A038208
|
|
|
| A038208 |
|
Triangle whose (i,j)-th entry is binomial(i,j)*2^i. |
|
+0
4
|
|
| 1, 2, 2, 4, 8, 4, 8, 24, 24, 8, 16, 64, 96, 64, 16, 32, 160, 320, 320, 160, 32, 64, 384, 960, 1280, 960, 384, 64, 128, 896, 2688, 4480, 4480, 2688, 896, 128, 256, 2048, 7168, 14336, 17920, 14336, 7168, 2048, 256, 512, 4608, 18432, 43008
(list; table; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Triangle obtained from expansion of (2+2x)^n.
|
|
REFERENCES
|
B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.
|
|
CROSSREFS
|
Row sums : A000302 (powers of 4).
Sequence in context: A045777 A136534 A121175 this_sequence A116694 A137778 A000017
Adjacent sequences: A038205 A038206 A038207 this_sequence A038209 A038210 A038211
|
|
KEYWORD
|
nonn,tabl,easy
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|
