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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038300 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*10^j. 0
1, 9, 10, 81, 180, 100, 729, 2430, 2700, 1000, 6561, 29160, 48600, 36000, 10000, 59049, 328050, 729000, 810000, 450000, 100000, 531441, 3542940, 9841500, 14580000, 12150000, 5400000, 1000000, 4782969, 37200870, 124002900, 229635000 (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..31.

MATHEMATICA

Flatten[Table[Binomial[i, j]9^(i-j) 10^j, {i, 0, 10}, {j, 0, i}]] (* Harvey P. Dale, Apr 29 2019 *)

CROSSREFS

Sequence in context: A033046 A025635 A116555 * A201948 A249311 A041039

Adjacent sequences:  A038297 A038298 A038299 * A038301 A038302 A038303

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 July 19 08:33 EDT 2019. Contains 325155 sequences. (Running on oeis4.)