|
Search: id:A130835
|
|
|
| A130835 |
|
Sum of all numbers having n or fewer digits and having the sum of their digits equal to n. |
|
+0
1
|
| |
|
|
OFFSET
|
1,2
|
|
|
EXAMPLE
|
Take n = 3. The numbers to be summed are 111, 3, 30, 300, 210, 201, 120, 102, 21, and 12, which add to 1110.
|
|
MAPLE
|
A007953 := proc(n) add(i, i=convert(n, base, 10)) ; end: A130835 := proc(n) local a, i; a := 0 ; for i from 1 to 10^n-1 do if A007953(i) = n then a := a+i ; fi ; od ; RETURN(a) ; end: seq(A130835(n), n=1..4) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 01 2007
|
|
CROSSREFS
|
Sequence in context: A101632 A132469 A009977 this_sequence A077420 A065424 A071268
Adjacent sequences: A130832 A130833 A130834 this_sequence A130836 A130837 A130838
|
|
KEYWORD
|
base,more,nonn
|
|
AUTHOR
|
J. M. Bergot (thekingfishb(AT)yahoo.ca), Jul 18 2007
|
|
EXTENSIONS
|
a(4)-a(6) from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 01 2007
|
|
|
Search completed in 0.002 seconds
|
