OFFSET
1,1
COMMENTS
A number k is called a c-perfect number if the sum of its proper c-divisors equals k.
For the definition of a c-divisor of an integer, see comment in A124771.
From Charlie Neder, Jan 17 2019: (Start)
Sequence in binary: 1011, 1000111, 11100010, 111001011100, 100001000001111, 100010111000111100011, 10010000000101000110011, 100001111110010100110011...
Next term > 10^7. (End)
FORMULA
A233394(a(n))=2*a(n).
EXAMPLE
For n=11 which is a concatenation of binary parts (10)(1)(1); we have proper positive c-divisors 1, 2, 3, and 5, the sum of which is 11, so 11 is in the sequence.
CROSSREFS
KEYWORD
nonn,more,base
AUTHOR
Vladimir Shevelev and Peter J. C. Moses, Dec 09 2013
EXTENSIONS
a(6)-a(8) from Charlie Neder, Jan 17 2019
STATUS
approved