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 A016987 (7*n)^7. 2
 0, 823543, 105413504, 1801088541, 13492928512, 64339296875, 230539333248, 678223072849, 1727094849536, 3938980639167, 8235430000000, 16048523266853, 29509034655744, 51676101935731 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(n) = A155955(n,7) for n>6. [From Reinhard Zumkeller, Jan 31 2009] LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 FORMULA 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 MATHEMATICA (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 *) PROG (MAGMA) [(7*n)^7: n in [0..25]]; // Vincenzo Librandi, Jun 18 2011 CROSSREFS Sequence in context: A210060 A057069 A016927 * A017155 A017251 A017359 Adjacent sequences:  A016984 A016985 A016986 * A016988 A016989 A016990 KEYWORD nonn,easy AUTHOR STATUS approved

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