|
|
A038239
|
|
Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*9^j.
|
|
0
|
|
|
1, 4, 9, 16, 72, 81, 64, 432, 972, 729, 256, 2304, 7776, 11664, 6561, 1024, 11520, 51840, 116640, 131220, 59049, 4096, 55296, 311040, 933120, 1574640, 1417176, 531441, 16384, 258048, 1741824, 6531840, 14696640, 19840464, 14880348
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
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.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|