References to A151955

a(1) = 102; thereafter a(n) = (a(n-1) with digits sorted into descending order) - (a(n-1) with digits sorted into ascending order) (see the Kaprekar map, A151949).
102, 198, 792, 693, 594, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495

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