A319650 a(n) = A073138(n) - n.

0, 0, 0, 0, 0, 1, 0, 0, 0, 3, 2, 3, 0, 1, 0, 0, 0, 7, 6, 9, 4, 7, 6, 7, 0, 3, 2, 3, 0, 1, 0, 0, 0, 15, 14, 21, 12, 19, 18, 21, 8, 15, 14, 17, 12, 15, 14, 15, 0, 7, 6, 9, 4, 7, 6, 7, 0, 3, 2, 3, 0, 1, 0, 0, 0, 31, 30, 45, 28, 43, 42, 49, 24, 39, 38, 45, 36, 43, 42, 45, 16

Offset: 0

Author

Seiichi Manyama, Sep 25 2018

Keywords

• nonn
• base
• look

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..8191

Crossrefs

Cf. A073138, A164884.

Programs

PARI

a(n) = fromdigits(vecsort(binary(n),,4), 2) - n; \\ Michel Marcus, Sep 25 2018

Ruby

def A(k, n)
  (0..n).map{|i| i.to_s(k).split('').sort.reverse.join.to_i(k) - i}
end
p A(2, 100)