OFFSET
0,4
LINKS
David A. Corneth, Table of n, a(n) for n = 0..998
FORMULA
EXAMPLE
For n = 2 there is only one digit '5' in the sequence 0, 1, 2, ..., 12.
For n = 3 there are 11 + 10 = 21 more digits '5' in { 15, 25, ..., 45, 50, ..., 59, 65, ..., 115 }, where 55 accounts for two '5's.
PROG
(PARI) print1(c=N=0); for(n=1, 8, print1(", "c+=sum(k=N+1, N=N*10+n, #select(d->d==5, digits(k)))))
(PARI) A277835(n, m=5)=if(n>m, A277835(n, m+1)+(m+2)*10^(n-m-1), A277830(n)-(m>n)) \\ M. F. Hasler, Nov 02 2016
CROSSREFS
KEYWORD
nonn,base
AUTHOR
M. F. Hasler, Nov 01 2016
EXTENSIONS
More terms from Lars Blomberg, Nov 05 2016
Removed incorrect b-file. - David A. Corneth, Dec 31 2020
STATUS
approved