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A269741
The almost perfect squares sequence.
2
0, 1, 4, 5, 9, 12, 13, 16, 17, 24, 25, 28, 33, 36, 37, 40, 41, 49, 52, 57, 60, 61, 64, 65, 72, 73, 81, 84, 85, 88, 96, 97, 100, 101, 105, 108, 112, 113, 116, 121, 124, 129, 133, 136, 144, 145, 148, 153, 156, 161, 168, 169, 172, 177, 180, 181, 184, 192, 193, 196, 197, 201, 204, 209, 217, 220, 221, 225, 228, 229, 232, 240, 241, 249, 256, 257, 264, 265, 268, 273
OFFSET
1,3
COMMENTS
See Ionascu (2015) for precise definition.
Numbers of the form a^2 + b^2 -2*GCD(a,b) + 1 with a,b not both 0. - Ray Chandler, Mar 21 2016
LINKS
E. J. Ionascu, Ehrhart polynomial for lattice squares, cubes and hypercubes, arXiv preprint arXiv:1508.03643, 2015
CROSSREFS
Close to but different from A194154.
Sequence in context: A230239 A194154 A297291 * A047610 A126004 A258251
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 16 2016
STATUS
approved