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A158821
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Triangle read by rows: row n (n>=0) ends with 1, and for n>=1 begins with n; other entries are zero.
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8
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1, 1, 1, 2, 0, 1, 3, 0, 0, 1, 4, 0, 0, 0, 1, 5, 0, 0, 0, 0, 1, 6, 0, 0, 0, 0, 0, 1, 7, 0, 0, 0, 0, 0, 0, 1, 8, 0, 0, 0, 0, 0, 0, 0, 1, 9, 0, 0, 0, 0, 0, 0, 0, 0, 1, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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Table of n, a(n) for n=0..102.
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FORMULA
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T(n,k) = A145677(n,n-k-1). [From R. J. Mathar, Apr 01 2009]
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EXAMPLE
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Triangle begins:
1
1, 1
2, 0, 1
3, 0, 0, 1
4, 0, 0, 0, 1
5, 0, 0, 0, 0, 1
6, 0, 0, 0, 0, 0, 1
7, 0, 0, 0, 0, 0, 0, 1
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MAPLE
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A158821 := proc(n, k)
if n = k then
1;
elif k = 0 then
n ;
else
0 ;
end if;
end proc: # R. J. Mathar, Jan 08 2015
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CROSSREFS
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Sequence in context: A280500 A309576 A128132 * A127701 A004199 A062283
Adjacent sequences: A158818 A158819 A158820 * A158822 A158823 A158824
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KEYWORD
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nonn,tabl,easy
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AUTHOR
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Gary W. Adamson, Mar 30 2008
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STATUS
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approved
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