is said to be tcefrep
(which is perfect
spelled backwards) if
is equal to
plus its reverse.
For example, is a tcefrep number since
The tcefrep numbers up to are
6, 498906, 20671542, 41673714, 73687923, 4158499614, 922964834547.
Pictorial representation of remainders (mod 2, 3, ...,11) frequency. For a table of values and more details click here