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A174064
Irregular triangle, row sums = n.
2
1, 2, 1, 2, 0, 4, 2, 2, 1, 4, 0, 2, 2, 4, 1, 0, 0, 8, 0, 0, 1, 4, 2, 0, 2, 2, 0, 4, 0, 4, 1, 2, 2, 0, 2, 4, 0, 4, 0, 0, 0, 8, 0, 2, 1, 0, 4, 4, 2, 0, 0, 2, 0, 8, 0, 4, 0, 0, 1, 0, 4, 8, 2, 0, 0, 0, 0, 0, 0, 16, 0, 0, 2, 0, 0, 0, 2, 8, 4, 0, 1, 4, 0, 0, 0, 4, 0, 8, 0, 2, 2, 4, 0, 0, 2, 4, 4, 0, 1, 2, 0, 8, 0, 0, 0
OFFSET
1,2
COMMENTS
Column 1 = A174026.
The triangle begins 1, 2,...then all columns >1 are shifted down twice from previous column. Next term in column 1 = n - (sum of terms in n-th row, columns >1). Terms of the triangle for columns >1 are filled in as a product of column 1 * column 1.
EXAMPLE
Triangle begins:
1;
2;
1, 2;
0, 4;
2, 2, 1;
4, 0, 2;
2, 4, 1, 0;
0, 8, 0, 0;
1, 4, 2, 0, 2;
2, 0, 4, 0, 4;
1, 2, 2, 0, 2, 4;
0, 4, 0, 0, 0, 8;
0, 2, 1, 0, 4, 4, 2;
0, 0, 2, 0, 8, 0, 4;
0, 0, 1, 0, 4, 8, 2, 0;
0, 0, 0, 0, 0, 16, 0, 0;
2, 0, 0, 0, 2, 8, 4, 0, 1;
4, 0, 0, 0, 4, 0, 8, 0, 2;
2, 4, 0, 0, 2, 4, 4, 0, 1, 2;
0, 8, 0, 0, 0, 8, 0, 0, 0, 4;
...
Example: Leftmost term in column 9 = 1 = (9 - (4 + 2 + 0 + 2)). Then the "1" is entered into the top heading as a multiplier. Multiply, filling in more terms, then obtain next term of left border as before.
CROSSREFS
Sequence in context: A187150 A023895 A070963 * A139158 A308209 A366403
KEYWORD
nonn,tabf,uned
AUTHOR
Gary W. Adamson, Mar 06 2010
STATUS
approved