A113317 Exclusionary biquadrates (fourth powers).

16, 81, 256, 2401, 4096, 6561, 331776, 531441, 614656, 1048576, 3111696, 7311616, 7890481, 11316496, 12117361, 21051121, 62742241, 74805201, 1698181681, 4430766096, 6505390336, 11019960576, 11716114081, 479174066176

Offset

1,1

Comments

An exclusionary biquadrate m^4 is one sharing no digit in common with its root m made up of distinct digits. Is a subsequence of A113316. Conjectured to be complete.

References

H. Ibstedt, Solution to Problem 2623, "Exclusionary Powers", pp. 346-9, Journal of Recreational Mathematics, vol. 32 No.4 2003-4 Baywood NY.

Links

Table of n, a(n) for n=1..24.

Crossrefs

Sequence in context: A050463 A075578 A113316 * A187457 A056118 A351602

Adjacent sequences: A113314 A113315 A113316 * A113318 A113319 A113320

Keyword

base,nonn,fini

Author

Lekraj Beedassy, Oct 26 2005

Extensions

Corrected by Don Reble, Nov 22 2006

Status

approved