51609

Appears in sequences

• Number of partitions in expanding space.at n=6A023880
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0001 pattern in any orientation.at n=11A147234
• Number of connected graphs on n vertices whose spectrum has fewer than n distinct eigenvalues.at n=8A242953
• Numbers that are equal to the sum of the number of divisors of their first k arithmetic derivatives, for some k.at n=41A269459
• Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of Product_{j>=1} 1/(1-x^j)^(j^(k*j)) in powers of x.at n=34A283674
• Numbers n with the property that n^2 contains a sequence of four or more consecutive 8's.at n=27A301938