1,2
a(3) is 17 because the sum of primes less than 2^3 is 2+3+5+7=17
Cf. A046731 sum of primes < 10^n.
Sequence in context: A081763 A146794 A146834 this_sequence A147412 A111268 A106973
Adjacent sequences: A130736 A130737 A130738 this_sequence A130740 A130741 A130742
nonn
Graeme McRae (g_m(AT)mcraefamily.com), Jul 06 2007
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