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 A139801 A139687(n) (1, 1, 1, 2, 2, 1) differences by rows, 0's deleted (*).Triangle on line. 1
 1, 2, 2, 2, 3, 3, 3, 6, 9, 9, 3, 6, 10, 14, 14, 4, 10, 20, 34, 48, 48, 4, 10, 20, 35, 55, 75, 75, 5, 15, 35, 70, 125, 200, 275, 275, 5, 15, 35, 70, 126, 209, 319, 429, 429, 6, 21, 56, 126, 252, 461, 780, 1209, 1638, 1638 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS (*) Full Triangle: 0; 1, 0; 2, 2, 0; 2, 3, 3, 0; 3, 6, 9, 9, 0; 3, 6, 10, 14, 14, 0; LINKS FORMULA Even rows (with a leading 1) are in A139687.Must be separated from odd rows. CROSSREFS Sequence in context: A161555 A029058 A046026 * A132328 A064822 A238337 Adjacent sequences:  A139798 A139799 A139800 * A139802 A139803 A139804 KEYWORD nonn,tabl,uned AUTHOR Paul Curtz, Jun 14 2008 STATUS approved

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Last modified April 1 10:33 EDT 2020. Contains 333159 sequences. (Running on oeis4.)