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A038279 Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*1^j. 2
1, 8, 1, 64, 16, 1, 512, 192, 24, 1, 4096, 2048, 384, 32, 1, 32768, 20480, 5120, 640, 40, 1, 262144, 196608, 61440, 10240, 960, 48, 1, 2097152, 1835008, 688128, 143360, 17920, 1344, 56, 1, 16777216, 16777216, 7340032, 1835008, 286720 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

T(i,j) is the number of i-permutations of 9 objects a,b,c,d,e,f,g,h,i with repetition allowed, containing j a's. - Zerinvary Lajos, Dec 21 2007

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..40.

EXAMPLE

1

8, 1

64, 16, 1

512, 192, 24, 1

4096, 2048, 384, 32, 1

32768, 20480, 5120, 640, 40, 1

262144, 196608, 61440, 10240, 960, 48, 1

2097152, 1835008, 688128, 143360, 17920, 1344, 56, 1

16777216, 16777216, 7340032, 1835008, 286720, 28672, 1792, 64, 1

MAPLE

for i from 0 to 8 do seq(binomial(i, j)*8^(i-j), j = 0 .. i) od; # Zerinvary Lajos, Dec 21 2007

CROSSREFS

Sequence in context: A271060 A089276 A051932 * A075503 A260040 A051379

Adjacent sequences:  A038276 A038277 A038278 * A038280 A038281 A038282

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified February 24 14:41 EST 2018. Contains 299623 sequences. (Running on oeis4.)