login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A031219 Write n in base 5 and juxtapose. 30
1, 2, 3, 4, 1, 0, 1, 1, 1, 2, 1, 3, 1, 4, 2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 3, 0, 3, 1, 3, 2, 3, 3, 3, 4, 4, 0, 4, 1, 4, 2, 4, 3, 4, 4, 1, 0, 0, 1, 0, 1, 1, 0, 2, 1, 0, 3, 1, 0, 4, 1, 1, 0, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 4, 1, 2, 0, 1, 2, 1, 1, 2, 2, 1, 2, 3, 1, 2, 4, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
An irregular table in which the n-th row lists the base-5 digits of n. - Jason Kimberley, Dec 07 2012
The base-5 Champernowne constant: it is normal in base 5. - Jason Kimberley, Dec 07 2012
LINKS
MATHEMATICA
Flatten@ IntegerDigits[ Range@ 40, 5] (* or *)
almostNatural[n_, b_] := Block[{m = 0, d = n, i = 1, l, p}, While[m <= d, l = m; m = (b - 1) i*b^(i - 1) + l; i++]; i--; p = Mod[d - l, i]; q = Floor[(d - l)/i] + b^(i - 1); If[p != 0, IntegerDigits[q, b][[p]], Mod[q - 1, b]]]; Array[ a[#, 5] &, 105] (* Robert G. Wilson v, Jul 01 2014 *)
PROG
(Magma) &cat[Reverse(IntegerToSequence(n, 5)):n in[1..31]]; // Jason Kimberley, Dec 07 2012
(Python)
from itertools import count, chain, islice
from sympy.ntheory.factor_ import digits
def A031219_gen(): return chain.from_iterable(digits(m, 5)[1:] for m in count(1))
A031219_list = list(islice(A031219_gen(), 30)) # Chai Wah Wu, Jan 07 2022
CROSSREFS
Tables in which the n-th row lists the base b digits of n: A030190 and A030302 (b=2), A003137 and A054635 (b=3), A030373 (b=4), this sequence (b=5), A030548 (b=6), A030998 (b=7), A031035 and A054634 (b=8), A031076 (b=9), A007376 and A033307 (b=10). - Jason Kimberley, Dec 06 2012
Sequence in context: A256295 A179078 A256305 * A346689 A071498 A255825
KEYWORD
nonn,base,cons,easy,tabf
AUTHOR
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)