Triangle read by rows: T(n,k) is the number of labeled magmas with n elements whose center contains k elements.

A391154

Triangle read by rows: T(n,k) is the number of labeled magmas with n elements whose center contains k elements.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =8a(4) =0a(5) =8a(6) =14580a(7) =4374a(8) =0a(9) =729a(10) =4048551936a(11) =226492416a(12) =18874368a(13) =0a(14) =1048576a(19) =0a(20) =30517578125a(26) =0

External references