A006395
Number of unsensed planar maps with n edges and without loops or parallel edges.
Original entry on oeis.org
1, 1, 1, 3, 5, 14, 42, 150, 624, 2947, 15079, 82607, 474030, 2816952, 17194524, 107226255
Offset: 0
- N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A384964
Triangle read by rows: T(n,k) is the number of embeddings on the sphere of connected simple planar graphs with n nodes and k faces up to orientation preserving isomorphisms, n >= 1, k=1..max(1,2*n-4).
Original entry on oeis.org
1, 1, 1, 1, 2, 2, 1, 1, 3, 8, 8, 6, 2, 1, 6, 29, 60, 73, 52, 25, 6, 2, 14, 113, 388, 768, 903, 728, 379, 136, 26, 6, 34, 444, 2303, 6584, 11782, 14321, 12113, 7298, 3048, 872, 147, 17, 95, 1763, 12650, 49806, 123547, 210314, 255884, 228807, 150929, 73428, 25536, 6142, 892, 73
Offset: 1
Triangle begins:
1;
1;
1, 1,
2, 2, 1, 1,
3, 8, 8, 6, 2, 1,
6, 29, 60, 73, 52, 25, 6, 2,
14, 113, 388, 768, 903, 728, 379, 136, 26, 6,
34, 444, 2303, 6584, 11782, 14321, 12113, 7298, 3048, 872, 147, 17;
...
A006400
Number of sensed simple planar maps with n edges and without vertices of degree 1.
Original entry on oeis.org
1, 0, 0, 1, 1, 2, 5, 11, 33, 117, 431, 1755, 7485
Offset: 0
- N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A384965
Number of sensed simple planar maps with n vertices.
Original entry on oeis.org
1, 1, 2, 6, 28, 253, 3461, 58963, 1139866, 23952568, 534729502, 12511055327, 303919972592, 7613826460120
Offset: 1
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