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A083072
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A subdiagonal of number array A083064.
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2
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1, 4, 29, 286, 3511, 51668, 888889, 17538454, 390892451, 9720791092, 267004296901, 8031916155134, 262709978263279, 9285541905849316, 352765522430193905, 14337731083770642838, 620867368421052631579
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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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a(n) = ((n+2)*(n+4)^n + 1)/(n+3).
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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