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A076776
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a(0) = 1, a(1) = 2, a(2) = 5; for n > 2, a(n) = a(n-1)*a(n-2).
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1
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1, 2, 5, 10, 50, 500, 25000, 12500000, 312500000000, 3906250000000000000, 1220703125000000000000000000000, 4768371582031250000000000000000000000000000000000
(list;
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listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 2^fibonacci(n-2)*5^fibonacci(n-1)for n>=2, fibonacci(n)=A000045(n). - Vladeta Jovovic and Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Nov 16 2002
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MAPLE
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with(combinat, fibonacci):A076776 := n->2^fibonacci(n-2)*5^fibonacci(n-1);
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MATHEMATICA
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nxt[{a_, b_}]:={b, a*b}; Join[{1}, NestList[nxt, {2, 5}, 15][[All, 1]]] (* Harvey P. Dale, Jun 07 2021 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Emily Shields (emilyshields_2001(AT)hotmail.com), Nov 14 2002
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Nov 16 2002
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STATUS
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approved
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