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Search: id:A050401
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| A050401 |
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Number of independent sets of nodes in P_4 X C_n (n > 2). |
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+0
1
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| 8, 1, 41, 142, 933, 4741, 26660, 143697, 788453, 4293286, 23454801, 127953981, 698467368, 3811712633, 20803963753, 113540081302, 619672701957, 3381980484909, 18457878595412, 100737602247769, 549796303339413
(list; graph; listen)
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OFFSET
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0,1
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FORMULA
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a(n) = a(n-1) + 20*a(n-2) + 27*a(n-3) - 14*a(n-4) - 25*a(n-5) + 4*a(n-6) + 5*a(n-7) - a(n-8)
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CROSSREFS
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Adjacent sequences: A050398 A050399 A050400 this_sequence A050402 A050403 A050404
Sequence in context: A028943 A050311 A050302 this_sequence A089276 A051932 A038279
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KEYWORD
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easy,nonn
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AUTHOR
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Stephen G. Penrice (spenrice(AT)ets.org), Dec 21 1999
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EXTENSIONS
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More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999
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