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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038335 Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*9^j. 0
1, 12, 9, 144, 216, 81, 1728, 3888, 2916, 729, 20736, 62208, 69984, 34992, 6561, 248832, 933120, 1399680, 1049760, 393660, 59049, 2985984, 13436928, 25194240, 25194240, 14171760, 4251528, 531441, 35831808, 188116992, 423263232 (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: A018870 A068614 A163920 * A040023 A109683 A140267

Adjacent sequences:  A038332 A038333 A038334 * A038336 A038337 A038338

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 17 13:28 EST 2012. Contains 206031 sequences.