A182556 a(0)=1, a(n+1) = (a(n)*6) XOR a(n).

1, 7, 45, 291, 2033, 10327, 55901, 377971, 2580161, 13329991, 68092909, 475337827, 3047910961, 21335374615, 108342024605, 611555770419, 4227169747201, 22855656310535, 114836769975597, 592467546841635, 4147130288467697, 24449879086004055, 171122765320764253

Offset

0,2

Links

Table of n, a(n) for n=0..22.

Formula

a(0)=1, a(n+1) = (a(n)*6) XOR a(n), where XOR is the bitwise exclusive-or operator.

Mathematica

NestList[BitXor[6#, #]&, 1, 30] (* Harvey P. Dale, Nov 23 2012 *)

Prog

(Python)
a=1
for n in range(55):
. print a,
. a ^= a*6

Crossrefs

Cf. A001317: a(n+1) = (a(n)*2) XOR a(n).

Cf. A038183: a(n+1) = (a(n)*4) XOR a(n).

Cf. A100311: a(n+1) = (a(n)*8) XOR a(n).

Sequence in context: A287811 A115194 A062274 * A363570 A219020 A280597

Adjacent sequences: A182553 A182554 A182555 * A182557 A182558 A182559

Keyword

nonn,base,easy

Author

Alex Ratushnyak, May 05 2012

Status

approved