A139673
Number of n X n symmetric binary matrices with all row sums 6.
Original entry on oeis.org
1, 232, 66178, 24243520, 11234051976, 6549149852112, 4762109992158288, 4274712091685443584, 4686484162304929219950, 6209619146419137708859600, 9845751579221258486943505348, 18509102695712474753650903363840, 40904306737052771732376660591663712
Offset: 6
A139674
Number of n X n symmetric binary matrices with all row sums 7.
Original entry on oeis.org
1, 764, 708256, 805036704, 1127512146540, 1966499966796816, 4274712091685443584, 11528251571501588791296, 38295413179145036856212700, 155411811543624388078758718000, 763997249847515085736557734880512, 4511824317564827934662170498445281792
Offset: 7
A139675
Number of n X n symmetric binary matrices with all row sums 8.
Original entry on oeis.org
1, 2620, 8372754, 30649435140, 133475706272700, 711040444591249476, 4686484162304929219950, 38295413179145036856212700, 386860001875783390762182911250, 4805622573099374975572752075805000, 72929153106385401417284439399165879652
Offset: 8
A333158
Irregular triangle read by rows: T(n,k) is the number of k-regular graphs on n labeled nodes with loops allowed, n >= 1, 0 <= k <= n + 1.
Original entry on oeis.org
1, 0, 1, 1, 1, 1, 1, 1, 0, 2, 0, 1, 1, 3, 8, 8, 3, 1, 1, 0, 38, 0, 38, 0, 1, 1, 15, 208, 730, 730, 208, 15, 1, 1, 0, 1348, 0, 20670, 0, 1348, 0, 1, 1, 105, 10126, 188790, 781578, 781578, 188790, 10126, 105, 1, 1, 0, 86174, 0, 37885204, 0, 37885204, 0, 86174, 0, 1
Offset: 1
Triangle begins:
1, 0, 1;
1, 1, 1, 1;
1, 0, 2, 0, 1;
1, 3, 8, 8, 3, 1;
1, 0, 38, 0, 38, 0, 1;
1, 15, 208, 730, 730, 208, 15, 1;
1, 0, 1348, 0, 20670, 0, 1348, 0, 1;
1, 105, 10126, 188790, 781578, 781578, 188790, 10126, 105, 1;
...
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