The number of different 4-colorings for the vertices of all triangulated planar polygons on a base with n vertices if the colors of two adjacent boundary vertices are fixed.
0, 2, 10, 40, 140, 462, 147
4 seqfan posts
Sat Mar 20 13:25:30 CET 2010 [seqfan] Re: A174397 and primes with negative value.
Sat Mar 20 13:03:39 CET 2010 [seqfan] Re: A174397 and primes with negative value.
Sat Mar 20 12:58:12 CET 2010 [seqfan] Re: A174397 and primes with negative value.
Sat Mar 20 05:21:21 CET 2010 [seqfan] Re: A174397 and primes with negative value.
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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