OFFSET
1,6
FORMULA
If n is of form 2^i*5^j then a(n)=0, otherwise a(n)=10^(n-1)+n-A053041(n)
EXAMPLE
a(6)=4 since 100000=6*16666+4
MATHEMATICA
Table[PowerMod[10, n-1, n], {n, 100}] (* Harvey P. Dale, Jul 17 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Henry Bottomley, Jul 20 2000
STATUS
approved