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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038240 Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*10^j. 0
1, 4, 10, 16, 80, 100, 64, 480, 1200, 1000, 256, 2560, 9600, 16000, 10000, 1024, 12800, 64000, 160000, 200000, 100000, 4096, 61440, 384000, 1280000, 2400000, 2400000, 1000000, 16384, 286720, 2150400, 8960000, 22400000, 33600000 (list; table; graph; refs; listen; history; text; 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.

LINKS

Table of n, a(n) for n=0..33.

CROSSREFS

Sequence in context: A233452 A061682 A246882 * A211160 A310535 A310536

Adjacent sequences:  A038237 A038238 A038239 * A038241 A038242 A038243

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 21 13:37 EDT 2019. Contains 327253 sequences. (Running on oeis4.)