|
|
A329492
|
|
a(n) = smallest d such that the sum of digits of 2^d - n is equal to d, or -1 if no such d exists.
|
|
3
|
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
The first open case is 11. Is a(11) = -1? See A329493.
If a(i) = m > 0 then A328882 takes the value -i for the first time at term 2^m-i. For example, the first appearance of -7 in A328882 is at term 2^103 - 7.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|