A284806 - OEIS

%I #6 Apr 05 2017 05:37:30

%S 3,12,18,24,30,36,42,75,123,171,219,267,315,390,432,474,516,558,600,

%T 642,732,774,816,858,900,942,984,1074,1116,1158,1200,1242,1284,1326,

%U 1416,1458,1500,1542,1584,1626,1668,1758,1800,1842,1884,1926,1968,2010,2100,2142

%N Fixed points of the transform A284805.

%e 219 is a term of the sequence because 219 in base 7 is 432, its complement in base 7 is 234 and the digit reverse is again 432 that is 219 in base 10.

%p P:=proc(q,h) local a,b,k,n; for n from 1 to q do a:=convert(n,base,h); b:=0;

%p for k from 1 to nops(a) do a[k]:=h-1-a[k]; b:=h*b+a[k]; od; if b=n then print(n); fi; od; end: P(10^2,7);

%Y Cf. A035928, A284805.

%K nonn,base,easy

%O 1,1

%A _Paolo P. Lava_, Apr 03 2017