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A325493
a(n) = Sum_{k=1..n} A325910(k) * 10^(2^(k-1)).
4
0, 10, 1010, 11011010, 1111001011011010, 11111111000011011111001011011010, 1111111111111111000000001111001011111111000011011111001011011010
OFFSET
0,2
LINKS
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
Sequence in context: A080120 A300571 A274069 * A006937 A037220 A179284
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 14 2019
STATUS
approved