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A341327
The spiral numbers not covered by any square in the square spiral tiling of A341160.
5
6, 19, 28, 29, 53, 54, 61, 62, 63, 86, 87, 114, 115, 116, 117, 161, 162, 163, 164, 185, 186, 187, 188, 189, 227, 228, 229, 230, 231, 232, 244, 245, 246, 247, 248, 311, 312, 313, 314, 315, 407, 408, 409, 410, 411, 412, 413, 771, 772, 773, 774, 775, 776, 777, 778, 779, 866, 867, 868, 869, 870, 871
OFFSET
1,1
COMMENTS
See A341160 for an image of the square spiral tiling which shows the uncovered numbers in black.
EXAMPLE
a(1) = 6 and a(2) = 19 as the first, third, fourth, and seventh square of A341160 cover the numbers (1), (5,18), (7,20), (40) respectively which leaves a gap containing numbers 6 and 19 which cannot be covered by any subsequence square.
CROSSREFS
KEYWORD
nonn
AUTHOR
Scott R. Shannon, Feb 09 2021
STATUS
approved