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A038268 Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*2^j. +0
1
1, 7, 2, 49, 28, 4, 343, 294, 84, 8, 2401, 2744, 1176, 224, 16, 16807, 24010, 13720, 3920, 560, 32, 117649, 201684, 144060, 54880, 11760, 1344, 64, 823543, 1647086, 1411788, 672280, 192080, 32928, 3136, 128, 5764801, 13176688, 13176688 (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: A030406 A096900 A096040 this_sequence A100983 A103237 A021582

Adjacent sequences: A038265 A038266 A038267 this_sequence A038269 A038270 A038271

KEYWORD

nonn,tabl,easy

AUTHOR

njas

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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