OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..9
PROG
(PARI) {a(n) = sum(i=1, n, 10^2^(i-1)*((-1)^(i-1)*sum(j=0, i-1, (-1)^j*10^2^j)-(1-(-1)^i)/2)/9)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 14 2019
STATUS
approved