A140764 Numbers equal to the sum of the squares of their duodecimal digit factorials.

1, 37, 613, 519018

Offset: 1

Author

Lekraj Beedassy, Jul 13 2008

Keywords

• fini
• full
• nonn
• base

Comments

In other words, numbers equal to the sum of the squares of factorials of their base-12 representation digits.

Examples

			We have, for instance, 37 = 31_(12) = (3!)^2 + (1!)^2 and 613 = 431_(12) = (4!)^2 + (3!)^2 + (1!)^2.
		

References

• J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 37, pp 15, Ellipses, Paris 2008.

Crossrefs

Cf. A014080.