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 A125152 The interspersion T(3,2,0), by antidiagonals. 2
 1, 3, 2, 9, 6, 4, 27, 20, 13, 5, 81, 60, 40, 15, 7, 243, 182, 121, 45, 22, 8, 729, 546, 364, 136, 68, 25, 10, 2187, 1640, 1093, 410, 205, 76, 30, 11, 6561, 4920, 3280, 1230, 615, 230, 91, 34, 12, 19683, 14762, 9841, 3690, 1845, 691, 273, 102, 38, 14 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Every positive integer occurs exactly once and each pair of rows are interspersed after initial terms. REFERENCES Clark Kimberling, Interspersions and fractal sequences associated with fractions (c^j)/(d^k), Journal of Integer Sequences 10 (2007, Article 07.5.1) 1-8. LINKS C. Kimberling, Interspersions and Dispersions. FORMULA Row 1: t(1,h)=Floor[r*3^(h-1)], where r=(3^0)/(2^0), h=1,2,3,... Row 2: t(2,h)=Floor[r*3^(h-1)], r=(3^2)/(2^2), where 2=Floor[r] is least positive integer (LPI) not in row 1. Row 3: t(3,h)=Floor[r*3^(h-1)], r=(3^2)/(2^1), where 4=Floor[r] is the LPI not in rows 1 and 2. Row m: t(m,h)=Floor[r*3^(h-1)], where r=(3^j)/(2^k), where k is the least integer >=0 for which there is an integer j for which the LPI not in rows 1,2,...,m-1 is Floor[r]. EXAMPLE Northwest corner: 1 3 9 27 81 243 729 2 6 20 60 182 546 1640 4 13 40 121 364 1093 3280 5 15 45 136 410 1230 3690 7 22 68 205 615 1845 5535 CROSSREFS Cf. A125156, A125160. Sequence in context: A235539 A191449 A175840 * A229119 A269867 A244319 Adjacent sequences:  A125149 A125150 A125151 * A125153 A125154 A125155 KEYWORD nonn,tabl AUTHOR Clark Kimberling, Nov 21 2006, corrected Nov 24 2006 STATUS approved

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Last modified May 18 22:26 EDT 2021. Contains 344004 sequences. (Running on oeis4.)