A232110 Fourth root of n contains n as a string of digits to the immediate right of the decimal point (excluding leading zeros).

3, 4, 27, 1913227, 9821998, 3588613885932, 7625632704605, 50859949338383, 21029300554772499, 97202454420912990, 440023525444970228, 783944985766933369, 1277151495727998611, 2283977463662240937, 72927208535053310211, 365439872472838714161, 740751647624914930138

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Robert Tanniru, PARI code

Example

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

Prog

(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
(PARI) /*Sample Run Using a = [0, 14], b=10, p=4 using PARI code in link */
GetAllGIs(0, 14, 10, 4, 1)

Crossrefs

Cf. A074841, A232086, A074762.

Sequence in context: A362887 A367388 A042829 * A140896 A005326 A298561

Adjacent sequences: A232107 A232108 A232109 * A232111 A232112 A232113

Keyword

nonn,base,hard

Author

Robert Tanniru, Nov 18 2013

Extensions

More terms from Bert Dobbelaere, Jun 23 2024

Status

approved