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A122760
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Triangle read by rows: t(n,m) = 2*3^m*(n mod 2).
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0
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0, 2, 6, 0, 0, 0, 2, 6, 18, 54, 0, 0, 0, 0, 0, 2, 6, 18, 54, 162, 486, 0, 0, 0, 0, 0, 0, 0, 2, 6, 18, 54, 162, 486, 1458, 4374, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 18, 54, 162, 486, 1458, 4374, 13122, 39366, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| A Cantor-based power of 3 triangular array.
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REFERENCES
| Lynn Arthur Steen and J. Arthur Seebach, Jr., Counterexamples in Topology, Dover, New York, 1978, 57-58
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EXAMPLE
| 0
2, 6
0, 0, 0
2, 6, 18, 54
0, 0, 0, 0, 0
2, 6, 18, 54, 162, 486
0, 0, 0, 0, 0, 0, 0
2, 6, 18, 54, 162, 486, 1458, 4374
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MATHEMATICA
| b[n_] := 2*Mod[n, 2] T2[n_, m_] := 3^n*b[m] b0 = Table[Table[T2[n, m], {n, 0, m}], {m, 0, 10}]; Flatten[b0] MatrixForm[b0]
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CROSSREFS
| Row sums: see A024101.
Sequence in context: A057678 A090071 A139062 * A186502 A165733 A039907
Adjacent sequences: A122757 A122758 A122759 * A122761 A122762 A122763
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KEYWORD
| nonn,tabl
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AUTHOR
| Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 21 2006
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EXTENSIONS
| Edited and corrected by N. J. A. Sloane, May 29 2009
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