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Search: id:A047998
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A047998 Triangle of numbers a(n,k) = number of "fountains" with n coins, k in the bottom row. +0
3
1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 2, 1, 0, 0, 0, 1, 3, 1, 0, 0, 0, 1, 3, 4, 1, 0, 0, 0, 0, 3, 6, 5, 1, 0, 0, 0, 0, 2, 7, 10, 6, 1, 0, 0, 0, 0, 1, 7, 14, 15, 7, 1, 0, 0, 0, 0, 1, 5, 17, 25, 21, 8, 1, 0, 0, 0, 0, 0, 5, 16, 35, 41, 28, 9, 1, 0, 0, 0, 0, 0, 3, 16, 40, 65, 63, 36, 10, 1 (list; table; graph; listen)
OFFSET

0,14

REFERENCES

R. K. Guy, personal communication.

See A005169 for further references.

EXAMPLE

1; 0 1; 0 0 1; 0 0 1 1; 0 0 0 2 1;...

CROSSREFS

Row sums give A005169.

Adjacent sequences: A047995 A047996 A047997 this_sequence A047999 A048000 A048001

Sequence in context: A022909 A032239 A057094 this_sequence A017847 A127841 A091006

KEYWORD

nonn,tabl,easy,nice

AUTHOR

njas

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Last modified May 22 15:55 EDT 2008. Contains 140006 sequences.


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