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4, 12, 32, 69, 121, 191, 304, 432, 582, 799, 1042, 1320, 1661, 2043, 2457, 3023, 3575, 4195, 4920, 5693, 6465, 7487, 8502, 9617, 10833, 12173, 13526, 15146, 16693, 18397, 20286, 22327, 24201, 26603, 28841, 31372, 34025, 36873, 39583, 42913, 46029
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OFFSET
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1,1
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COMMENTS
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One-half of ((number of vertices in graph SC(n,2)) - (number of vertices in graph SC(n,1))).
It would be nice to have a formula for this sequence. The graphs SC(n,1) are fairly well understood, while SC(n,m) is basically a mystery for m >= 2.
Note that the offsets in A331755 and A331763 have different meanings, which is why there is an extra "+1" in the definition of the current sequence.
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LINKS
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EXAMPLE
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For n=2, SC(2,2) has 37 vertices and SC(2,1) has 13 vertices (see illustrations), so a(2) = (37-13)/2 = 12.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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