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1, 3, 6, 12, 17, 27, 42, 72, 79, 93, 114, 156, 191, 261, 366, 576, 587, 609, 642, 708, 763, 873, 1038, 1368, 1445, 1599, 1830, 2292, 2677, 3447, 4602, 6912, 6925, 6951, 6990, 7068, 7133, 7263, 7458, 7848, 7939, 8121, 8394, 8940, 9395, 10305, 11670, 14400, 14543
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: (1/(1 - x)) * Product_{k>=0} (1 + prime(k+1)*x^(2^k)). - Ilya Gutkovskiy, Aug 18 2021
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PROG
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(PARI)
A019565(n) = { my(m=1, p=1); while(n>0, p = nextprime(1+p); if(n%2, m *= p); n >>= 1); (m); };
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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