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1, 5, 3, 5, 7, 5, 9, 7, 9, 7, 9, 11, 9, 11, 9, 13, 11, 13, 11, 13, 11, 13, 15, 13, 15, 13, 15, 13, 17, 15, 17, 15, 17, 15, 17, 15, 17, 19, 17, 19, 17, 19, 17, 19, 17
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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Row sums = A077221: (1, 8, 17, 32, 49, 72, 97, ...).
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LINKS
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Table of n, a(n) for n=0..44.
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FORMULA
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2*A002024 - A000012 (signed + - + -, ... by columns).
A002024 = (1; 2,2; 3,3,3; ...); A000012(signed) = (1; -1,1; 1,-1,1; ...).
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EXAMPLE
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First few rows of the triangle:
1;
5, 3;
5, 7, 5;
9, 7, 9, 7;
9, 11, 9, 11, 9;
13, 11, 13, 11, 13, 11;
13, 15, 13, 15, 13, 15, 13;
....
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CROSSREFS
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Cf. A002024, A000012, A077221.
Sequence in context: A092516 A269893 A336055 * A128010 A185046 A114740
Adjacent sequences: A131922 A131923 A131924 * A131926 A131927 A131928
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson, Jul 29 2007
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STATUS
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approved
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