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A145352
Triangle read by rows, A054525 * A157497
0
1, 0, 2, 0, 0, 3, 0, 2, 0, 4, 0, 0, 0, 0, 5, 0, 4, 6, 0, 0, 6, 0, 0, 0, 0, 0, 0, 7, 0, 4, 0, 12, 0, 0, 0, 8, 0, 0, 15, 0, 0, 0, 0, 0, 9, 0, 8, 0, 0, 20, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 4, 21, 36, 0, 30, 0, 0, 0, 0, 0, 12
OFFSET
1,3
COMMENTS
Row sums = A156833: (1, 2, 3, 6, 5, 16, 7,...)
FORMULA
Inverse Mobius transform of triangle A157497.
EXAMPLE
First few rows of the triangle =
1;
0, 2;
0, 0, 3;
0, 2, 0, 4;
0, 0, 0, 0, 5;
0, 4, 6, 0, 0, 6;
0, 0, 0, 0, 0, 0, 7;
0, 4, 0, 12, 0, 0, 0, 8;
0, 0, 15, 0, 0, 0, 0, 0, 9;
0, 8, 0, 0, 20, 0, 0, 0, 0, 10;
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11;
0, 4, 21, 36, 0, 30, 0, 0, 0, 0, 0, 12;
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13;
0, 12, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 14;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
STATUS
approved