83152domain: NAppears in sequencesNumber of primes of the form 30k + 23 less than 10^n.at n=6A091171Number of 1:4:sqrt(17) proportioned triangles on a (n+1) X (n+1) grid.at n=28A189884Number of integer partitions of n that cannot be partitioned into a set of sets.at n=50A382078