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A130530
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Column 1 of triangle A130528.
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3
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1, 2, 8, 80, 1516, 46236, 2054980, 124679524, 9862677332, 983245788908, 120355090800248, 17718237890571456, 3084857630587469352, 626415990053461622968, 146625663260655992992072
(list;
graph;
refs;
listen;
history;
text;
internal format)
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