OFFSET
1,2
COMMENTS
a(n) is the number of n-digit numbers in A139245.
After initial 1 or 2 values the same as A137233. - R. J. Mathar, Aug 23 2021
LINKS
FORMULA
MATHEMATICA
LinearRecurrence[{10}, {1, 4, 45}, 25]
CROSSREFS
KEYWORD
nonn,base,easy,less
AUTHOR
Stefano Spezia, Jul 25 2021
STATUS
approved