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A157428 Lower left-hand x-coordinates of invisible 2 X 2 squares with 0 < y < x. 15
54, 174, 550, 574, 588, 608, 678, 740, 740, 790, 798, 804, 874, 944, 986, 986, 994, 1034, 1064, 1104, 1104, 1158, 1208, 1274, 1308, 1308, 1308, 1308, 1406, 1420, 1462, 1462, 1462, 1494, 1494, 1550, 1580, 1580, 1610, 1624, 1638, 1650, 1664, 1664, 1664 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Visible Point
EXAMPLE
{54, 20}, {174, 98}, {550, 114}, {574, 368}, {588, 494}, {608, 474}, ...
CROSSREFS
Sequence in context: A250792 A044980 A248598 * A187299 A288626 A124007
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Mar 01 2009
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)