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 A133728 A128174 * A127775. 1
 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; text; internal format)
 OFFSET 1,3 COMMENTS Row sums = the triangular series: (1, 3, 6, 10, 15, 21, 28, ...), see A000217. LINKS FORMULA A128174 * A127775 as infinite lower triangular matrices. Triangle by columns: (2k-1, 0, 2k-1, 0,...) in k-th column. 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 Philippe Deléham, Oct 28 2011 CROSSREFS Cf. A000217 Sequence in context: A319083 A045406 A143468 * A127627 A154792 A185911 Adjacent sequences:  A133725 A133726 A133727 * A133729 A133730 A133731 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Sep 21 2007 EXTENSIONS Corrected and extended by Philippe Deléham, Oct 28 2011 STATUS approved

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Last modified October 18 18:10 EDT 2018. Contains 316323 sequences. (Running on oeis4.)