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0, 823543, 105413504, 1801088541, 13492928512, 64339296875, 230539333248, 678223072849, 1727094849536, 3938980639167, 8235430000000, 16048523266853, 29509034655744, 51676101935731
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refs;
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history;
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OFFSET
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0,2
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COMMENTS
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a(n) = A155955(n,7) for n>6. [From Reinhard Zumkeller, Jan 31 2009]
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
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FORMULA
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a(0)=0, a(1)=823543, a(2)=105413504, a(3)=1801088541, a(4)=13492928512, a(5)=64339296875, a(6)=230539333248, a(7)=678223072849, a(n)=8*a(n-1)- 28*a(n-2)+ 56*a(n-3)-70*a(n-4)+56*a(n-5)-28*a(n-6)+8*a(n-7)-a(n-8). - Harvey P. Dale, Apr 01 2013
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MATHEMATICA
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(7*Range[0, 20])^7 (* or *) LinearRecurrence[{8, -28, 56, -70, 56, -28, 8, -1}, {0, 823543, 105413504, 1801088541, 13492928512, 64339296875, 230539333248, 678223072849}, 20] (* Harvey P. Dale, Apr 01 2013 *)
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PROG
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(MAGMA) [(7*n)^7: n in [0..25]]; // Vincenzo Librandi, Jun 18 2011
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CROSSREFS
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Sequence in context: A210060 A057069 A016927 * A017155 A017251 A017359
Adjacent sequences: A016984 A016985 A016986 * A016988 A016989 A016990
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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