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A191682
Twice A113473.
0
2, 4, 4, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
OFFSET
1,1
COMMENTS
Arises in a renewal problem. Suppose X(1), X(2), ... are independent and identically distributed random variables with P(X = 1) = P(X = 2) = 0.5, and let N(n) denote the first value of k such that X(1)*X(2)*...*X(k) > x. Then a(n) gives the expected value of N(n), n = 1, 2, 3, ...
CROSSREFS
Cf. A113473.
Sequence in context: A251546 A282894 A162550 * A113724 A161794 A111650
KEYWORD
nonn,easy,less
AUTHOR
Edward Omey, Jun 11 2011
STATUS
approved