A058194
Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.
Original entry on oeis.org
1, 3, 21, 162, 1636, 19977, 298416, 5300296, 110219750, 2639842989, 71859429837, 2198244062193, 74860247277672, 2815351714711122, 116130005180284423, 5222901881792429337, 254791333526874348652, 13420798291405599027605, 760201936044714899316798, 46137860613934391781325337, 2990483661567310913388458734
Offset: 0
A058791
Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 4 subsets of the cover and that intersection of every 4 subsets of the cover contains at most one point.
Original entry on oeis.org
1, 4, 25, 278, 5532, 200589, 11662671, 981458725, 111213730857, 16212510876591, 2947663429595884, 653299790376494253, 173373367472722467460, 54295204354760461199529, 19822683467350158062736540
Offset: 1
A058792
Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 5 subsets of the cover and that intersection of every 5 subsets of the cover contains at most one point.
Original entry on oeis.org
1, 5, 44, 966, 53535, 7043925, 1775617861, 738134963014, 461550358993886, 409321620633426443, 493892363593918906465
Offset: 1
A058793
Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 6 subsets of the cover and that intersection of every 6 subsets of the cover contains at most one point.
Original entry on oeis.org
1, 6, 73, 2957, 431805, 193413963, 198914729182, 389238347659505, 1292594846197639190, 6753309741099683530616
Offset: 1
A052172
Pure 3-multicomplexes on infinite set of nodes with n 3-simplexes.
Original entry on oeis.org
1, 1, 5, 30, 332, 6414
Offset: 0
Comments