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A210324 Number of 3-divided words of length n over a 3-letter alphabet. 1
0, 0, 1, 16, 78, 324, 1141, 3885, 12630, 40315, 126604, 393986, 1216525 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

See A210109 for further information.

Row sums of the following irregular triangle which shows how many words of length n over a 3-letter alphabet are 3-divided in k>=1 different ways:

1;

12, 3, 1;

29, 29, 12, 5, 2, 1;

100, 56, 69, 40, 21, 21, 11, 3, 2, 1;

247, 183, 188, 115, 101, 96, 71, 40, 44, 27, 17, 6, 3, 2, 1;

716, 474, 546, 328, 323, 268, 246, 203, 186, 140, 128, 100, 79, 56, 49, 22, 9, 6, 3, 2, 1;

- R. J. Mathar, Mar 25 2012

REFERENCES

Computed by David Scambler, Mar 19 2012

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Cf. A210109.

Sequence in context: A303179 A061995 A212563 * A250231 A212896 A250279

Adjacent sequences:  A210321 A210322 A210323 * A210325 A210326 A210327

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 20 2012

EXTENSIONS

After a typo was corrected, the entries were confirmed by R. J. Mathar, Mar 22 2012

STATUS

approved

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Last modified June 16 04:54 EDT 2019. Contains 324145 sequences. (Running on oeis4.)