1,1
A048109 is applied to central binomial coefficients. Both ud and not-ud divisor numbers are (equal) powers of 2: 2^*1+r[ n ], where r[ n ] the number of distinct prime factors of the coefficients: A034973
A034444[ A001405[ n ] ] = A048105[ A001405[ x ] ]
n=59 when the corresponding Binomial[ 59,29 ] has 8192 divisors, of which 4096 are unitary and 4096 are not.
A001405, A034444, A034973, A048105, A048109.
Sequence in context: A113190 A169804 A092112 * A183185 A045282 A039291
Adjacent sequences: A048193 A048194 A048195 * A048197 A048198 A048199
nonn
Labos E. (labos(AT)ana.sote.hu)
