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A288985
Numbers n for which A287874(n) < n, where A287874 is the concatenation of the prime factorization, all written in binary.
1
117649, 177147, 531441, 823543, 1048576, 1594323, 1771561, 1953125, 2097152, 4194304, 4782969, 4826809, 5764801, 8388608, 9765625
OFFSET
1,1
COMMENTS
A287874 is the concatenation of the prime factorization (without exponents equal to 1), all written in binary (so the result has only digits 0 and 1). Here the result of this operation is considered as a decimal number. For example, the first term is 117649 because this numer is larger than the value A287874(117649) = 111110 (even when this is considered as a decimal and not binary number).
PROG
(PARI) forcomposite(n=1, 1e7, A287874(n)<n&&print1(n", "))
CROSSREFS
Cf. A287874.
Sequence in context: A251953 A204075 A235068 * A016926 A016986 A017154
KEYWORD
nonn,base
AUTHOR
M. F. Hasler, Jun 21 2017
STATUS
approved