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RATS Sequence
Sequence description
Reverse Add Then Sort the digits in the previous term
Sequence terms
1, 2, 4, 8, 16, 77, 145, 668, 1345, 6677, 13444, 55778, 133345, ...
Table program
NestWhileList[FromDigits[Sort[IntegerDigits[# + FromDigits[Reverse[IntegerDigits[#]]]]]] &, 1, UnsameQ, All, n]
Plot