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 A186190 First digit of tribonacci sequence A000213. 2
 1, 1, 1, 3, 5, 9, 1, 3, 5, 1, 1, 3, 6, 1, 2, 4, 7, 1, 2, 4, 8, 1, 2, 5, 9, 1, 3, 6, 1, 2, 3, 6, 1, 2, 4, 7, 1, 2, 4, 9, 1, 3, 5, 1, 1, 3, 6, 1, 2, 4, 7, 1, 2, 4, 8, 1, 2, 5, 9, 1, 3, 6, 1, 2, 3, 6, 1, 2, 4, 7, 1, 2, 4, 9, 1, 3, 5, 1, 1, 3, 6, 1, 2, 4, 7, 1, 2, 4, 8, 1, 2, 5, 9, 1, 3, 6, 1, 2, 3, 6, 1, 2, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Sequence obeys the Benford law about distribution of first digit d in a sequence: P(d) = log_10(1+1/d). LINKS EXAMPLE a(10) = 1 since Trib(10) = 105. MATHEMATICA t = {1, 1, 1}; Do[AppendTo[t, t[[-1]] + t[[-2]] + t[[-3]]], {100}]; Table[IntegerDigits[i][[1]], {i, t}] CROSSREFS Cf. A000213. Sequence in context: A058642 A258086 A141251 * A019739 A101298 A296452 Adjacent sequences:  A186187 A186188 A186189 * A186191 A186192 A186193 KEYWORD nonn,base AUTHOR Carmine Suriano, Feb 14 2011 STATUS approved

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Last modified June 21 10:09 EDT 2021. Contains 345360 sequences. (Running on oeis4.)