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%I #6 Aug 02 2018 07:27:28
%S 2,3,14,32,0,287,438,0,2242,5080,11122,12374,77469
%N Number of shapes of grid-filling curves of order 4*n+1 (on the square grid) with turns by +-90 degrees that are generated by folding morphisms.
%C Terms are nonzero if and only if 4*n+1 is a term of A057653.
%H Jörg Arndt, Julia Handl, <a href="http://archive.bridgesmathart.org/2018/bridges2018-179.html">Plane-filling Folding Curves on the Square Grid</a>, Proceedings of Bridges 2018: Mathematics, Art, Music, Architecture, Education, Culture; Stockholm (2018).
%Y Cf. A296148 (number of folding curves of all orders).
%Y Cf. A265685 (simple curves of order 4*n+1).
%K nonn,hard,more
%O 1,1
%A _Joerg Arndt_, Dec 06 2017
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