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A127468
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Triangle, row sums = n, right border = n*phi(n).
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1
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1, 0, 2, -3, 0, 6, 0, -4, 0, 8, -15, 0, 0, 0, 20, 0, -6, 0, 0, 0, 12, -35, 0, 0, 0, 0, 0, 42, 0, -8, 0, -16, 0, 0, 0, 32, -9, 0, -36, 0, 0, 0, 0, 0, 54, 0, -30, 0, 0, 0, 0, 0, 0, 0, 40
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Right border = n*phi(n), A002618; row sums = n.
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FORMULA
| A126466 * A054525
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EXAMPLE
| First few rows of the triangle are:
1;
0, 2;
-3, 0, 6;
0, -4, 0, 8;
-15, 0, 0, 0, 20;
0, -6, 0, 0, 0, 12;
-35, 0, 0, 0, 0, 0, 42;
...
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CROSSREFS
| Cf. A127466, A054525, A002618.
Sequence in context: A122830 A190902 A115562 * A173720 A173717 A058301
Adjacent sequences: A127465 A127466 A127467 * A127469 A127470 A127471
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KEYWORD
| tabl,uned,sign
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 15 2007
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EXTENSIONS
| Changed -0 to 0 (fifth term) Geoff Bailey (geoff(AT)maths.usyd.edu.au), Mar 22 2009
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