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 A124172 Triangle in which row n contains values from 1 to n in alphabetical order (in English). 0
 1, 1, 2, 1, 3, 2, 4, 1, 3, 2, 5, 4, 1, 3, 2, 5, 4, 1, 6, 3, 2, 5, 4, 1, 7, 6, 3, 2, 8, 5, 4, 1, 7, 6, 3, 2, 8, 5, 4, 9, 1, 7, 6, 3, 2, 8, 5, 4, 9, 1, 7, 6, 10, 3, 2, 8, 11, 5, 4, 9, 1, 7, 6, 10, 3, 2, 8, 11, 5, 4, 9, 1, 7, 6, 10, 3, 12, 2, 8, 11, 5, 4, 9, 1, 7, 6, 10, 13, 3, 12, 2 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS This is a fractal sequence: if the first instance of each number is deleted, the original sequence is recovered. - Franklin T. Adams-Watters, Nov 24 2013 While it is unlikely to ever make a practical difference, for the sake of definiteness we specify that standard American number names are to be used. - Franklin T. Adams-Watters, Nov 24 2013 For 100th row, "one"=50th value and "one hundred"=51st value, placing the extremes in the center. - Peter Woodward, Jun 27 2015 LINKS EXAMPLE Triangle begins: 1, 1,2, 1,3,2, 4,1,3,2 5,4,1,3,2 5,4,1,6,3,2, ... MATHEMATICA names = {"one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen"}; Flatten[Table[Table[Position[names, Sort[Take[names, n]][[i]], 1, 1][[1, 1]], {i, n}], {n, Length[names]}]] (* T. D. Noe, Nov 25 2013 *) CROSSREFS Cf. A002260. Sequence in context: A332899 A331521 A244967 * A058933 A087470 A191475 Adjacent sequences:  A124169 A124170 A124171 * A124173 A124174 A124175 KEYWORD nonn,tabl,word AUTHOR Colm Mulcahy, Dec 05 2006 EXTENSIONS Edited name and more terms from Franklin T. Adams-Watters, Nov 24 2013 STATUS approved

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Last modified May 31 15:41 EDT 2020. Contains 334748 sequences. (Running on oeis4.)