168710720

Appears in sequences

• Triangle read by rows: T(n,k) is the number of nonisomorphic magmas with n elements whose center contains k elements.at n=10A391155
• Number of nonisomorphic magmas with n elements and empty center.at n=4A391156
• Triangle read by rows: T(n,k) is the number of nonisomorphic magmas with n elements and a closed center of size k.at n=10A391161