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Search: id:A154471
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| A154471 |
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Function A154470 iterated, starting from the initial value 31706. |
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+0
3
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| 31706, 4517553, 4875253, 59657666, 65204804, 467824043836025, 289931140991491544956, 232993060651625904999520564, 12090001045837621170309278896817, 41831072194327417802054794318226030
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OFFSET
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0,1
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COMMENT
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Note how A014486(31706) = 2988236 and (A014486->parenthesization 2988236) = (() (() (()) (())) (()) (())), from which, when after converting ()'s to e's we get: (e (e (e) (e)) (e) (e)), corresponding to the initial state e[e[e][e]][e][e] of Wolfram's system. A154472 gives the corresponding sequence with ()'s removed.
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LINKS
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A. Karttunen, Table of n, a(n) for n = 0..100
S. Wolfram, A New Kind of Science, Wolfram Media Inc., (2002), pp. 102--104, 896-898.
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FORMULA
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a(0) = 31706, a(n) = A154470(a(n-1)).
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PROGRAM
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(Scheme:) (define (A154471 n) (if (= 0 n) 31706 (A154470 (A154471 (-1+ n)))))
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CROSSREFS
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Sequence in context: A090059 A151815 A113846 this_sequence A140939 A134124 A054038
Adjacent sequences: A154468 A154469 A154470 this_sequence A154472 A154473 A154474
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KEYWORD
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nonn
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AUTHOR
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Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Jan 11 2009
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