A151950 a(n) = A151949(n)/9.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 7, 6, 5, 4, 3, 2, 1, 0, 1, 2, 8, 7, 6, 5, 4, 3, 2, 1, 0, 1, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 11, 11, 22

Offset: 0

Author

N. J. A. Sloane, Aug 18 2009

Keywords

• nonn
• base
• look

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..10000 (terms 0..1000 from Joseph Myers)
• Index entries for the Kaprekar map

Crossrefs

In other bases: A164884 (base 2), A164994 (base 3), A165013 (base 4), A165033 (base 5), A165052 (base 6), A165072 (base 7), A165091 (base 8), A165111 (base 9). [From Joseph Myers, Sep 05 2009]

Programs

PARI

a(n) = my(d=digits(n)); (fromdigits(vecsort(d,,4)) - fromdigits(vecsort(d)))/9; \\ Michel Marcus, Sep 25 2018

Extensions

Extended by Joseph Myers, Aug 28 2009