|
Search: id:A053832
|
|
|
| A053832 |
|
Sum of digits of n written in base 12. |
|
+0
3
|
|
| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 7, 8
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
COMMENT
|
Also the fixed point of the morphism 0->{0,1,2,3,4,5,6,7,8,9,10,11}, 1->{1,2,3,4,5,6,7,8,9,10,11,12}, 2->{2,3,4,5,6,7,8,9,10,11,12,13}, etc. - Robert G. Wilson v Jul 27 2006.
a(n) = A138530(n,12) for n > 11. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 26 2008
|
|
LINKS
|
Eric Weisstein's World of Mathematics, Duodecimal
Eric Weisstein's World of Mathematics, Digit Sum
|
|
FORMULA
|
a(0)=0, a(12n+i)=a(n)+i 0<=i<=11; a(n)=n-11*(sum(k>0, floor(n/12^k))=n-11*A064459 (n). - Benoit Cloitre, Dec 19, 2002
|
|
EXAMPLE
|
a(20)=1+8=9 because 20 is written as 18 base 12
|
|
MATHEMATICA
|
Table[Plus @@ IntegerDigits[n, 12], {n, 0, 85}] (* or *)
Nest[ Flatten[ #1 /. a_Integer -> Table[a + i, {i, 0, 11}]] &, {0}, 2] (* Robert G. Wilson v Jul 27 2006 *)
|
|
PROGRAM
|
(PARI) a(n)=if(n<1, 0, if(n%12, a(n-1)+1, a(n/12)))
|
|
CROSSREFS
|
Cf. A000120, A007953.
Sequence in context: A130024 A131232 A010881 this_sequence A056961 A043271 A062759
Adjacent sequences: A053829 A053830 A053831 this_sequence A053833 A053834 A053835
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Henry Bottomley (se16(AT)btinternet.com), Mar 28 2000
|
|
|
Search completed in 0.005 seconds
|
