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A045810 Number of times the digits are repeated in A045799. 2
3, 3, 9, 12, 15, 4, 4, 8, 12, 8, 16, 4, 18, 16, 20, 18, 27, 36, 45, 5, 5, 5, 10, 5, 15, 5, 10, 10, 36, 10, 15, 5, 20, 5, 15, 25, 15, 5, 10, 10, 5, 20, 15, 20, 5, 15, 40, 25, 8, 24, 33, 33, 22, 33, 55, 6, 51, 6, 6, 6, 12, 18, 6, 12, 6, 12, 6, 18, 12, 12, 23, 6, 6, 12, 6, 6, 6, 12, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

N. Nomoto, In the list of divisors of n,... [Dead link]

EXAMPLE

100[ 0(3),1(3) ], 10001[ 0(3),1(3) ], 10100[ 0(9),1(9) ],....

MATHEMATICA

f[v_] := If[Length[v] == 2 && v[[1]] == v[[2]], v[[1]], 0]; a[n_] := f[(Tally @ Flatten @ Join @ IntegerDigits[Divisors[n], 2])[[;; , 2]]]; Select[a /@ Range[ 1200], # > 0 &] (* Amiram Eldar, Sep 08 2019 *)

CROSSREFS

Cf. A038564, A038565, A045799.

Sequence in context: A173048 A165992 A117153 * A166720 A325243 A319271

Adjacent sequences:  A045807 A045808 A045809 * A045811 A045812 A045813

KEYWORD

easy,nonn,base

AUTHOR

Naohiro Nomoto

EXTENSIONS

Offset corrected by Amiram Eldar, Sep 08 2019

STATUS

approved

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Last modified September 27 13:13 EDT 2020. Contains 337380 sequences. (Running on oeis4.)