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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038247 Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*5^j. 0
1, 5, 5, 25, 50, 25, 125, 375, 375, 125, 625, 2500, 3750, 2500, 625, 3125, 15625, 31250, 31250, 15625, 3125, 15625, 93750, 234375, 312500, 234375, 93750, 15625, 78125, 546875, 1640625, 2734375, 2734375, 1640625, 546875, 78125 (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: A162962 A170834 A154630 * A093643 A189318 A176160

Adjacent sequences:  A038244 A038245 A038246 * A038248 A038249 A038250

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 14:12 EST 2012. Contains 206031 sequences.