A052437
Number of simple unlabeled n-node graphs with 1 center node.
Original entry on oeis.org
1, 0, 1, 2, 8, 29, 180, 1463, 20093, 474063, 20334351, 1602439752
Offset: 1
A052438
Number of simple unlabeled n-node graphs with 2 center nodes.
Original entry on oeis.org
0, 2, 0, 2, 4, 19, 84, 821, 12485, 343572, 16164685, 1289300669
Offset: 1
A052439
Number of simple unlabeled n-node graphs with 3 center nodes.
Original entry on oeis.org
0, 0, 3, 0, 4, 18, 119, 1055, 17297, 486446, 24269709, 2095669951
Offset: 1
A052440
Number of simple unlabeled n-node graphs with 4 center nodes.
Original entry on oeis.org
0, 0, 0, 7, 0, 18, 118, 1426, 24853, 763319, 39773455, 3569963990
Offset: 1
A052441
Number of simple unlabeled n-node graphs with 5 center nodes.
Original entry on oeis.org
0, 0, 0, 0, 18, 0, 129, 1390, 29987, 1015304, 59286916, 5764417079
Offset: 1
A324244
Triangle read by rows: T(n,k) is the number of simple connected graphs on n nodes with k peripheral nodes.
Original entry on oeis.org
1, 0, 1, 0, 1, 1, 0, 2, 2, 2, 0, 5, 4, 7, 5, 0, 25, 20, 16, 23, 28, 0, 185, 146, 119, 57, 123, 223, 0, 2459, 1728, 1523, 948, 405, 903, 3151, 0, 58156, 36109, 32119, 24637, 13927, 4713, 11746, 79673, 0, 2617378, 1446609, 1304109, 1026845, 723871, 353620, 110734, 279535, 3853870
Offset: 1
Triangle begins:
1;
0, 1;
0, 1, 1;
0, 2, 2, 2;
0, 5, 4, 7, 5;
0, 25, 20, 16, 23, 28;
0, 185, 146, 119, 57, 123, 223;
0, 2459, 1728, 1523, 948, 405, 903, 3151;
0, 58156, 36109, 32119, 24637, 13927, 4713, 11746, 79673;
...
A324239
Irregular triangle read by rows: T(n,k) is the number of simple connected graphs on n nodes with radius k, (0 <= k <= floor(n/2)).
Original entry on oeis.org
1, 0, 1, 0, 2, 0, 4, 2, 0, 11, 10, 0, 34, 76, 2, 0, 156, 682, 15, 0, 1044, 9864, 207, 2, 0, 12346, 245518, 3197, 19, 0, 274668, 11366961, 74614, 326, 2
Offset: 1
Triangle begins:
1;
0, 1;
0, 2;
0, 4, 2;
0, 11, 10;
0, 34, 76, 2;
0, 156, 682, 15;
0, 1044, 9864, 207, 2;
0, 12346, 245518, 3197, 19;
0, 274668, 11366961, 74614, 326, 2;
...
A324264
Number of simple connected graphs on n unlabeled nodes with diameter equal to radius.
Original entry on oeis.org
1, 1, 1, 2, 5, 28, 223, 3151, 79673, 3853870
Offset: 1
Showing 1-8 of 8 results.
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