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A071582
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Powers of 4 written backwards.
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4
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1, 4, 61, 46, 652, 4201, 6904, 48361, 63556, 441262, 6758401, 4034914, 61277761, 46880176, 654534862, 4281473701, 6927694924, 48196897171, 63767491786, 449609778472, 6777261159901, 4011156408934, 61444068129571
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internal format)
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OFFSET
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0,2
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LINKS
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MAPLE
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a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||(4^n)):
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MATHEMATICA
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FromDigits[Reverse[IntegerDigits[#]]]&/@(4^Range[0, 30]) (* Harvey P. Dale, Jan 28 2013 *)
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PROG
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(PARI) for(i=1, 50, n=4^i; s=ceil(log(n)/log(10)); print1(sum(i=0, s, 10^(s-i-1)*(floor(n/10^i)-10*floor(n/10^(i+1)))), ", "))
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CROSSREFS
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KEYWORD
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easy,nonn,base
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AUTHOR
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STATUS
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approved
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