A071582 Powers of 4 written backwards.

1, 4, 61, 46, 652, 4201, 6904, 48361, 63556, 441262, 6758401, 4034914, 61277761, 46880176, 654534862, 4281473701, 6927694924, 48196897171, 63767491786, 449609778472, 6777261159901, 4011156408934, 61444068129571

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: A340937 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