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Search: id:A050402
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| A050402 |
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Number of independent sets of nodes in C_4 X C_n (n > 2). |
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+0
1
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| 7, 1, 35, 121, 743, 3561, 18995, 96433, 500871, 2573905, 13292995, 68492073, 353290343, 1821383097, 9392360019, 48428332641, 249716406791, 1287608913057, 6639354593123, 34234612471001, 176524935990503
(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) + 17*a(n-2) + 23*a(n-3) + a(n-4) - 9*a(n-5) - a(n-6) + a(n-7)
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CROSSREFS
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Sequence in context: A083994 A084181 A002678 this_sequence A027643 A051931 A038267
Adjacent sequences: A050399 A050400 A050401 this_sequence A050403 A050404 A050405
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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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