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 A139413 Triangle read by rows: row n gives the numbers A010888(n*k) for k = 1..n. 3
 1, 2, 4, 3, 6, 9, 4, 8, 3, 7, 5, 1, 6, 2, 7, 6, 3, 9, 6, 3, 9, 7, 5, 3, 1, 8, 6, 4, 8, 7, 6, 5, 4, 3, 2, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 4, 6, 8, 1, 3, 5, 7, 9, 2, 4, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 4 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Nathaniel Johnston, Table of n, a(n) for n = 1..10000 EXAMPLE Triangle begins: 1 2 4 3 6 9 4 8 3 7 5 1 6 2 7 6 3 9 6 3 9 7 5 3 1 8 6 4 8 7 6 5 4 3 2 1 9 9 9 9 9 9 9 9 9 ... MAPLE A010888:=proc(n) return ((n-1) mod 9)+1; end: for n from 1 to 9 do for k from 1 to n do printf("%d ", A010888(n*k)); od: printf("\n"): od: # Nathaniel Johnston, Apr 21 2011 MATHEMATICA Table[FixedPoint[Total@ IntegerDigits[#] &, n k], {n, 13}, {k, n}] // Flatten (* Michael De Vlieger, Oct 31 2021 *) CROSSREFS Cf. A007953 (column 1), A180592 - A180599 (columns 2 - 9), A010888, A038194. Sequence in context: A077661 A077583 A153125 * A075362 A110749 A077529 Adjacent sequences:  A139410 A139411 A139412 * A139414 A139415 A139416 KEYWORD easy,nonn,tabl,base AUTHOR Philippe Lallouet (philip.lallouet(AT)orange.fr), Apr 19 2008 EXTENSIONS More terms and several terms corrected by Nathaniel Johnston, Apr 21 2011 STATUS approved

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Last modified January 19 02:30 EST 2022. Contains 350464 sequences. (Running on oeis4.)