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1, 0, 3, 1, 0, 5, 0, 3, 0, 7, 1, 0, 5, 0, 9, 0, 3, 0, 7, 0, 11, 1, 0, 5, 0, 9, 0, 13, 0, 3, 0, 7, 0, 11, 0, 15, 1, 0, 5, 0, 9, 0, 13, 0, 17, 0, 3, 0, 7, 0, 11, 0, 15, 0, 19, 1, 0, 5, 0, 9, 0, 13, 0, 17, 0, 21, 0, 3, 0, 7, 0, 11, 0, 15, 0, 19, 0, 23
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Row sums = the triangular series: (1, 3, 6, 10, 15, 21, 28, ...), see A000217.
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FORMULA
| A128174 * A127775 as infinite lower triangular matrices. Triangle by columns: (2k-1, 0, 2k-1, 0,...) in k-th column.
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EXAMPLE
| Triangle begins :
1 ;
0, 3 ;
1, 0, 5 ;
0, 3, 0, 7 ;
1, 0, 5, 0, 9 ;
0, 3, 0, 7, 0, 11 ;
1, 0, 5, 0, 9, 0, 13 ;... - From DELEHAM Philippe, Oct 28 2011
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CROSSREFS
| Cf. A000217
Sequence in context: A186827 A045406 A143468 * A127627 A154792 A185911
Adjacent sequences: A133725 A133726 A133727 * A133729 A133730 A133731
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 21 2007
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EXTENSIONS
| Corrected and extended by DELEHAM Philippe, Oct 28 2011
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