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A173545
Ulam numbers that are perfect squares.
1
1, 4, 16, 36, 324, 400, 441, 1296, 2809, 2916, 3481, 4624, 4900, 5184, 6889, 11236, 11881, 13689, 17689, 19600, 20736, 21904, 24025, 25921, 34969, 39204, 45796, 47089, 47524, 47961, 56169, 59536, 72361, 73984, 78961, 87616, 95481, 106929, 114921, 120409, 127449
OFFSET
1,2
LINKS
EXAMPLE
324 is in the sequence because it is a perfect square (18^2=324) as well as an Ulam number (A002858).
CROSSREFS
Intersection of A000290 and A002858.
Sequence in context: A130279 A030158 A054246 * A340233 A080709 A256322
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Feb 20 2010
EXTENSIONS
More terms from Amiram Eldar, Aug 22 2020
STATUS
approved