A151951 -id:A151951 - cp's OEIS frontend

A151946 a(1) = 8127; 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).

8127, 7443, 3996, 6264, 4176, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174

Offset: 1

N. J. A. Sloane, Aug 18 2009

Similar in spirit to the RATS (Reverse, Add Then Sort) sequences.
Converges to the fixed point 6174. For the list of fixed points see A099009.
The initial value 1001 is the smallest number that converges to 6174 - see A151967.

Cf. A099009, A151947, A151949, A151951, A151955, A151956, A151967. A151968.

A151956 a(1) = 1002; 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).

Original entry on oeis.org

1002, 2088, 8532, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174, 6174

Offset: 1

Harvey P. Dale, Aug 18 2009

For the list of fixed points see A099009.

Index entries for the Kaprekar map

Cf. A099009, A151947, A151949, A151950, A069746, A151955, A151951, A151957.

cp's OEIS Frontend

A151946 a(1) = 8127; 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).

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