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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

Table of n, a(n) for n=1..103.

Index entries for sequences related to Benford's law

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 November 12 17:06 EST 2019. Contains 329058 sequences. (Running on oeis4.)