OFFSET
1,2
COMMENTS
In other words, numbers equal to the sum of the squares of factorials of their base-12 representation digits.
REFERENCES
J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 37, pp 15, Ellipses, Paris 2008.
EXAMPLE
We have, for instance, 37 = 31_(12) = (3!)^2 + (1!)^2 and 613 = 431_(12) = (4!)^2 + (3!)^2 + (1!)^2.
CROSSREFS
KEYWORD
fini,full,nonn,base
AUTHOR
Lekraj Beedassy, Jul 13 2008
STATUS
approved