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A127474
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Triangle, square of A054522.
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1
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1, 2, 1, 3, 0, 4, 4, 3, 0, 4, 5, 0, 0, 0, 16, 6, 3, 8, 0, 0, 4, 7, 0, 0, 0, 0, 0, 36, 8, 7, 0, 12, 0, 0, 0, 16, 9, 0, 16, 0, 0, 0, 0, 0, 36, 10, 5, 0, 0, 32, 0, 0, 0, 0, 16
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history;
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OFFSET
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1,2
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COMMENTS
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Right border = A127473, squares of phi(n) terms. Row sums = A057660: (1, 3, 7, 11, 21,...)
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LINKS
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Table of n, a(n) for n=1..55.
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FORMULA
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(A054522)^2 as an infinite lower triangular matrix.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
3, 0, 4;
4, 3, 0, 4;
5, 0, 0, 0, 16;
6, 3, 8, 0, 0, 4;
7, 0, 0, 0, 0, 0, 36;
8, 7, 0, 12, 0, 0, 0, 16;
...
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CROSSREFS
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Cf. A127473, A057660, A054522.
Sequence in context: A070817 A231347 A180988 * A326400 A281617 A280544
Adjacent sequences: A127471 A127472 A127473 * A127475 A127476 A127477
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson, Jan 15 2007
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STATUS
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approved
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