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A131925
2*A002024 - A000012(signed).
1
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
OFFSET
0,2
COMMENTS
Row sums = A077221: (1, 8, 17, 32, 49, 72, 97, ...).
FORMULA
2*A002024 - A000012 (signed + - + -, ... by columns).
A002024 = (1; 2,2; 3,3,3; ...); A000012(signed) = (1; -1,1; 1,-1,1; ...).
EXAMPLE
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;
....
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 29 2007
STATUS
approved