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0, 1, 3, 7, 17, 41, 107, 287, 809, 2341, 6965, 21101, 65031, 202939, 640441, 2039509, 6546861, 21158437, 68791923, 224839127, 738316629, 2434622357, 8058616301, 26765349429, 89173526191, 297942766331, 998072479961, 3351459203873
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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REFERENCES
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Z. A. Lomnicki, Two-terminal series-parallel networks, Adv. Appl. Prob., 4 (1972), 109-150.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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