A227645 Perfect powers equal to the sum of 4 factorial numbers.

4, 8, 9, 16, 27, 32, 125, 128, 169, 243, 361, 729, 961, 1444, 10201, 403225, 725904

Offset: 1

Author

Giovanni Resta, Jul 19 2013

Keywords

• nonn

Comments

a(18), if it exists, is larger than 10^100.

Examples

			729 = 3^6 = 1! + 2! + 3! + 6!.
		

Links

• Giovanni Resta, Decompositions of a(1)-a(17)

Crossrefs

Cf. A114377, A227644-A227651, A082920.