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A071582 Powers of 4 written backwards. 1
1, 4, 61, 46, 652, 4201, 6904, 48361, 63556, 441262, 6758401, 4034914, 61277761, 46880176, 654534862, 4281473701, 6927694924, 48196897171, 63767491786, 449609778472, 6777261159901, 4011156408934, 61444068129571 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

MAPLE

a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||(4^n)):

seq(a(n), n=0..50);  # Alois P. Heinz, Apr 09 2015

MATHEMATICA

FromDigits[Reverse[IntegerDigits[#]]]&/@(4^Range[0, 30]) (* Harvey P. Dale, Jan 28 2013 *)

PROG

(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)))), ", "))

CROSSREFS

Sequence in context: A229771 A136385 A173607 * A158300 A129452 A131014

Adjacent sequences:  A071579 A071580 A071581 * A071583 A071584 A071585

KEYWORD

easy,nonn,base

AUTHOR

Benoit Cloitre, Jun 01 2002

STATUS

approved

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Last modified October 20 15:29 EDT 2019. Contains 328267 sequences. (Running on oeis4.)