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TOPICS
Algebra
Applied Mathematics
Calculus and Analysis
Discrete Mathematics
Foundations of Mathematics
Geometry
History and Terminology
Number Theory
Probability and Statistics
Recreational Mathematics
Topology
Alphabetical Index
New in MathWorld
Number Theory
Special Numbers
Miscellaneous Special Numbers
Magic Integer
References
Sloane, N. J. A. Sequence
A004210
/M2728 in "The On-Line Encyclopedia of Integer Sequences."