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A256571
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a(n) is the total number of pentagrams in a variant of pentagram fractal after n iterations.
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7
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1, 6, 21, 56, 131, 281, 556, 1046, 1896, 3346, 5796, 9916, 16806, 28316, 47506
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OFFSET
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1,2
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COMMENTS
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Inspired by A255870. But at the higher iterations, the perimeter is an irregular polygon instead of a pentagon. The construction rule is sides to vertices expansion. See illustration in the links.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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a(9) corrected and a(10)-a(15) added by Udo Vieth, Jan 16 2023
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STATUS
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approved
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