80722

Appears in sequences

• a(n) is the smallest value of k such that number of non-unitary prime divisors of k-th Catalan number, A000108(k) = C(2*k,k)/(k+1) equals n.at n=39A081395
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.at n=12A147453
• Number T(n,k) of equivalence classes of ways of placing k 4 X 4 tiles in an n X n square under all symmetry operations of the square; irregular triangle T(n,k), n>=4, 0<=k<=floor(n/4)^2, read by rows.at n=44A236757