login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A033104 Number of 5's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n. 10
0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 15, 16, 19, 20, 22, 24, 26, 27, 31, 33, 36, 39, 43, 45, 51, 53, 57, 60, 63, 67, 74, 76, 79, 82, 88, 91, 98, 100, 104, 109, 113, 116, 124, 127, 132, 136, 141, 144, 151, 155, 162, 166 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..62.

MATHEMATICA

f[n_] := Count[ Flatten@ Table[ IntegerDigits[k, b], {k, n}, {b, 2, n + 1}], 5] - (n - 5); f[1] = f[2] = f[3] = f[4] = 0; Array[f, 62] (* Robert G. Wilson v, Nov 14 2012 *)

CROSSREFS

Cf. A033094, A033096, A033098, A033100, A033102, A033103, A033106, A033108, A033110, A033112.

Sequence in context: A073518 A144769 A165737 * A191325 A190209 A048856

Adjacent sequences:  A033101 A033102 A033103 * A033105 A033106 A033107

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 22:03 EDT 2019. Contains 328211 sequences. (Running on oeis4.)