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 A119930 Sum of the numbers of the matrix A111490 along a boustrophedon path: a11, a11+a12, a11+a12+a21, etc. 1
 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 15, 18, 20, 21, 22, 23, 24, 27, 29, 30 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES G. Balzarotti and P. P. Lava, Le sequenze di numeri interi, Hoepli, 2008, p. 60. LINKS EXAMPLE If we rewrite the matrix putting on the top the upper left edge and then we sum the numbers following a boustrophedon path we have: .............1.\ ..........._____\ ........../1...1. ........./_________ .........1...2...1.\ ......______________\ ...../.1...2...1...1. ..../__________________ .....1...2...3...2...1.\ ..______________________\ ..1...2...3...1...1...1. then 1, 1+1, 1+1+1, 1+1+1+1, 1+1+1+1+2, 1+1+1+1+2+1, 1+1+1+1+2+1+1, 1+1+1+1+2+1+1+1, 1+1+1+1+2+1+1+1+2, 1+1+1+1+2+1+1+1+2+1, ... That is 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 15, 18, 20, etc. CROSSREFS Cf. A119931. Sequence in context: A267306 A001959 A263135 * A173552 A188010 A008320 Adjacent sequences:  A119927 A119928 A119929 * A119931 A119932 A119933 KEYWORD nonn,easy AUTHOR Paolo P. Lava and Giorgio Balzarotti, May 30 2006 STATUS approved

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Last modified October 21 06:39 EDT 2019. Contains 328292 sequences. (Running on oeis4.)