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A038294 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*4^j. +0
1
1, 9, 4, 81, 72, 16, 729, 972, 432, 64, 6561, 11664, 7776, 2304, 256, 59049, 131220, 116640, 51840, 11520, 1024, 531441, 1417176, 1574640, 933120, 311040, 55296, 4096, 4782969, 14880348, 19840464, 14696640, 6531840, 1741824, 258048 (list; table; graph; listen)
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.

CROSSREFS

Sequence in context: A104728 A058093 A122846 this_sequence A019881 A049256 A019982

Adjacent sequences: A038291 A038292 A038293 this_sequence A038295 A038296 A038297

KEYWORD

nonn,tabl,easy

AUTHOR

njas

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.


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