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Search: id:A021024
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| A021024 |
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Expansion of 1/((1-x)(1-2x)(1-3x)(1-5x)). |
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+0
1
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| 1, 11, 80, 490, 2751, 14721, 76630, 392480, 1990901, 10041031, 50466780, 253122870, 1267989451, 6347088941, 31756902530, 158848951660, 794438206401, 3972771638451, 19865600535880, 99333230758850
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=(stirling2(n,4)+stirling2(n,5), n>=4 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 04 2007
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MAPLE
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with(combinat):seq(stirling2(n, 4)+stirling2(n, 5), n=4..23); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 04 2007
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CROSSREFS
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Sequence in context: A125348 A126506 A026897 this_sequence A091098 A091115 A024146
Adjacent sequences: A021021 A021022 A021023 this_sequence A021025 A021026 A021027
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KEYWORD
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nonn
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AUTHOR
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njas
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