|
| |
|
|
A031235
|
|
Triangle T(n,k): write n in base 5, reverse order of digits.
|
|
26
|
|
|
|
0, 1, 2, 3, 4, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, 0, 4, 1, 4, 2, 4, 3, 4, 4, 4, 0, 0, 1, 1, 0, 1, 2, 0, 1, 3, 0, 1, 4, 0, 1, 0, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 4, 1, 1, 0, 2, 1, 1, 2, 1, 2, 2, 1, 3, 2, 1, 4, 2, 1, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,3
|
|
|
LINKS
|
Reinhard Zumkeller, Rows n = 0..1000 of triangle, flattened
|
|
|
MATHEMATICA
|
Reverse[IntegerDigits[#, 5]]&/@Range[0, 40]//Flatten (* Harvey P. Dale, Aug 02 2016 *)
|
|
|
PROG
|
(PARI) A031235(n, k=-1)=/*k<0&&error("Flattened sequence not yet implemented.")*/n\5^k%5 \\ Assuming that columns are numbered starting with k=0 as in A030308, A030341, ... - M. F. Hasler, Jul 21 2013
(Haskell)
a031235 n k = a031235_tabf !! n !! k
a031235_row n = a031235_tabf !! n
a031235_tabf = iterate succ [0] where
succ [] = [1]
succ (4:ts) = 0 : succ ts
succ (t:ts) = (t + 1) : ts
-- Reinhard Zumkeller, Sep 18 2015
|
|
|
CROSSREFS
|
Cf. A030308, A030341, A030386, A030567, A031007, A031045, A031087, A031298 for the base-2 to base-10 analogs.
Cf. A007091.
Sequence in context: A023868 A122275 A197024 * A090141 A049264 A010874
Adjacent sequences: A031232 A031233 A031234 * A031236 A031237 A031238
|
|
|
KEYWORD
|
nonn,base,tabf,less
|
|
|
AUTHOR
|
Clark Kimberling
|
|
|
EXTENSIONS
|
Initial 0 and better name by Philippe Deléham, Oct 20 2011
|
|
|
STATUS
|
approved
|
| |
|
|
