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A132113
Multiply previous term by 8 and reverse.
8
1, 8, 46, 863, 4096, 86723, 487396, 8619983, 46895986, 888761573, 4852900117, 63900232883, 460368102115, 296184492863, 4092495749632, 65079956993723, 487949556936025, 28845546953093, 447426573467032, 6526377852149753
OFFSET
1,2
LINKS
FORMULA
a(n) = reverse(8 * a(n-1)) where a(1) = 1.
Conjecture: a(n)^(1/n) tends to 10. - Vaclav Kotesovec, Jan 03 2020
EXAMPLE
a(4) = reverse(8 * a(3))
= reverse(8 * reverse(8 * a(2)))
= reverse(8 * reverse(8 * reverse(8 * a(1))))
= reverse(8 * reverse(8 * reverse(8)))
= reverse(8 * reverse(8 * 8))
= reverse(8 * 46)
= reverse(368)
= 863.
MAPLE
rev:=proc(n) local nn: nn:=convert(n, base, 10): add(nn[j]*10^(nops(nn)-j), j = 1..nops(nn)) end proc: a[1]:=1: for n from 2 to 20 do a[n]:=rev(8*a[n-1]) end do: seq(a[n], n=1..20); # Definition corrected by Emeric Deutsch, Nov 07 2007
MATHEMATICA
NestList[IntegerReverse[8#]&, 1, 20] (* Harvey P. Dale, Dec 22 2018 *)
CROSSREFS
Cf. A036447 (*2), A163632 (*3), A132064 (*4), A045539 (*5), A132078 (*6), A132114 (*7), A133361 (*9).
Sequence in context: A141788 A317224 A368269 * A376842 A378419 A085299
KEYWORD
base,nonn
AUTHOR
Rachit Agrawal (rachit_agrawal(AT)daiict.ac.in), Oct 31 2007
EXTENSIONS
Definition corrected by Emeric Deutsch, Nov 07 2007
Edited by Jon E. Schoenfield, May 10 2019
STATUS
approved