Number of triangular polyominoes (or polyiamonds) with n cells (turning over is allowed, holes are allowed, must be connected along edges).
1, 1, 1, 3, 4, 12, 24, 66, 160, 448, 1186, 3334, 9235, 26166, 73983, 211297, 604107
5 seqfan posts
Mon Oct 26 02:56:06 CET 2009 [seqfan] Re: Guided browsing of the OEIS based upon personal preferences?
Sun Oct 25 19:53:08 CET 2009 [seqfan] Re: Guided browsing of the OEIS based upon personal preferences?
Mon Apr 20 00:42:53 CEST 2009 [seqfan] Re: Fwd: Re: A000207: Maple-Program wrong
Mon Apr 20 00:10:41 CEST 2009 [seqfan] Re: Fwd: Re: A000207: Maple-Program wrong
Sun Apr 19 23:09:20 CEST 2009 [seqfan] Re: Fwd: Re: A000207: Maple-Program wrong
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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