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A276131
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a(n) = (a(n-1)^2+a(n-2)^2+a(n-3)^2+a(n-4)^2+a(n-1)*a(n-2)+a(n-1)*a(n-3)+a(n-1)*a(n-4)+a(n-2)*a(n-3)+a(n-2)*a(n-4)+a(n-3)*a(n-4))/a(n-5) with five initial ones.
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1
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1, 1, 1, 1, 1, 10, 136, 20251, 413100001, 170660037240000001, 2912484838126132813026335712191641, 62371823031725048177115183368983888882661870237372850050710016335
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OFFSET
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0,6
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LINKS
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FORMULA
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a(n) = 15*a(n-1)*a(n-2)*a(n-3)*a(n-4)-a(n-1)-a(n-2)-a(n-3)-a(n-4)-a(n-5).
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MATHEMATICA
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nxt[{a_, b_, c_, d_, e_}]:={b, c, d, e, 15(b*c*d*e)-a-b-c-d-e}; NestList[nxt, {1, 1, 1, 1, 1}, 15][[;; , 1]] (* Harvey P. Dale, May 18 2024 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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