login
Fourth root of n contains n as a string of digits to the immediate right of the decimal point (excluding leading zeros).
4

%I #20 Jun 23 2024 12:24:53

%S 3,4,27,1913227,9821998,3588613885932,7625632704605,50859949338383,

%T 21029300554772499,97202454420912990,440023525444970228,

%U 783944985766933369,1277151495727998611,2283977463662240937,72927208535053310211,365439872472838714161,740751647624914930138

%N Fourth root of n contains n as a string of digits to the immediate right of the decimal point (excluding leading zeros).

%H Robert Tanniru, <a href="/A232110/a232110_1.txt">PARI code</a>

%e 1913227^(1/4) = 37.19132279207...

%o (PARI) isok(n) = {if (ispower(n, 4), return (0)); fr = frac(n^(1/4)); while (frac(fr) < 1/10, fr *= 10); nd = length(digits(n)); fr *= 10^nd; floor(fr) == n;} \\ _Michel Marcus_, Nov 20 2013

%o (PARI) /*Sample Run Using a = [0,14], b=10, p=4 using PARI code in link */

%o GetAllGIs(0,14,10,4,1)

%Y Cf. A074841, A232086, A074762.

%K nonn,base,hard

%O 1,1

%A _Robert Tanniru_, Nov 18 2013

%E More terms from _Bert Dobbelaere_, Jun 23 2024