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A083898 Number of divisors of n with largest digit <= 3 (base 10). 5
1, 2, 2, 2, 1, 3, 1, 2, 2, 3, 2, 4, 2, 2, 2, 2, 1, 3, 1, 4, 3, 4, 2, 4, 1, 3, 2, 2, 1, 5, 2, 3, 4, 2, 1, 4, 1, 2, 3, 4, 1, 4, 1, 4, 2, 3, 1, 4, 1, 3, 2, 3, 1, 3, 2, 2, 2, 2, 1, 7, 1, 3, 3, 3, 2, 6, 1, 2, 3, 3, 1, 4, 1, 2, 2, 2, 2, 4, 1, 4, 2, 2, 1, 5, 1, 2, 2, 4, 1, 5, 2, 3, 3, 2, 1, 5, 1, 2, 4, 5, 2, 4, 2, 3, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A083897(n) + A083890(n) = A083899(n) - A083891(n).

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Table[Count[Divisors[n], _?(Total[Most[Drop[DigitCount[#], 3]]]==0&)], {n, 120}] (* Harvey P. Dale, Dec 21 2018 *)

CROSSREFS

Cf. A054055, A000005.

Sequence in context: A106253 A078720 A270488 * A078314 A068322 A230243

Adjacent sequences:  A083895 A083896 A083897 * A083899 A083900 A083901

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, May 08 2003

STATUS

approved

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Last modified July 16 23:49 EDT 2019. Contains 325092 sequences. (Running on oeis4.)