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Fixed points of A333692.
2

%I #6 Apr 07 2020 08:49:24

%S 0,1,2,3,4,5,6,7,8,9,10,12,14,15,16,17,18,20,21,24,28,30,31,32,33,34,

%T 36,40,42,48,55,56,60,62,63,64,65,66,68,72,73,80,84,85,96,103,110,112,

%U 120,124,126,127,128,129,130,132,136,144,146,160,168,170,181

%N Fixed points of A333692.

%C For any n >= 0, n belongs to this sequence iff 2*n also belongs to this sequence.

%C This sequence contains A000079, A000225, A018900, A023758, A295235.

%o (PARI) is(n, base=2)={ my (b=digits(n, base), p=[]); for (k=1, #b, p=concat(p, b[k]); if (b[k], p=Vecrev(p))); n==fromdigits(p, base) }

%Y Cf. A000079, A000225, A018900, A023758, A295235, A333692, A333693.

%K nonn,base

%O 1,3

%A _Rémy Sigrist_, Apr 04 2020