login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038305 Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*3^j. 0
1, 10, 3, 100, 60, 9, 1000, 900, 270, 27, 10000, 12000, 5400, 1080, 81, 100000, 150000, 90000, 27000, 4050, 243, 1000000, 1800000, 1350000, 540000, 121500, 14580, 729, 10000000, 21000000, 18900000, 9450000, 2835000, 510300, 51030 (list; table; graph; refs; listen; history; 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.

CROSSREFS

Sequence in context: A111126 A165790 A077194 * A089478 A028967 A097530

Adjacent sequences:  A038302 A038303 A038304 * A038306 A038307 A038308

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 18:47 EST 2012. Contains 205663 sequences.