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Search: id:A001696
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| A001696 |
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a(n) = a(n-1)*(1+a(n-1)-a(n-2)), a(0) = 0, a(1) = 1.
(Formerly M1268 N0487)
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+0
4
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| 0, 1, 2, 4, 12, 108, 10476, 108625644, 11798392680793836, 139202068568601568785946949658348, 19377215893777651167043206536157529523359277782016064519251404524
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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A. V. Aho and N. J. A. Sloane, Some doubly exponential sequences, Fib. Quart., 11 (1973), 429-437.
Index entries for sequences of form a(n+1)=a(n)^2 + ...
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PROGRAM
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(PARI) a(n)=if(n<2, n>0, a(n-1)*(1+a(n-1)-a(n-2)))
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CROSSREFS
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a(n)=A039941(2*n); first difference sequence of this sequence is A001697 - Michael Somos, May 19, 2000.
Sequence in context: A053631 A120618 A038791 this_sequence A013333 A062000 A053040
Adjacent sequences: A001693 A001694 A001695 this_sequence A001697 A001698 A001699
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KEYWORD
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nonn,easy
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AUTHOR
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njas
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