A341327 The spiral numbers not covered by any square in the square spiral tiling of A341160.

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.

Links

Table of n, a(n) for n=1..62.

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

Cf. A341160, A340974, A174344, A274923, A296030, A275161.

Sequence in context: A042215 A041911 A372302 * A210288 A038125 A319968

Adjacent sequences: A341324 A341325 A341326 * A341328 A341329 A341330

Keyword

nonn

Author

Scott R. Shannon, Feb 09 2021

Status

approved