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A235142
Positions of A235141, the first differences of A234300, which equal -1.
3
4, 10, 22, 32, 64, 84, 108, 132, 186, 214, 284, 360, 446, 490, 590, 642, 694, 746, 930, 990, 1192, 1266, 1342, 1568, 1738, 2086, 2180, 2276, 2470, 2572, 2668, 2780, 3326, 3556, 3680, 3922, 4298, 4430, 4560, 4832, 4968
OFFSET
1,1
COMMENTS
The positions reflect square radii which are uniquely twice a square integer, that is, the completion of only one square on the y = x line.
FORMULA
a(n) = A235386(n+1) - 1.
EXAMPLE
For n = 2, a(2) = 10. The 10th term of A235141 is -1 corresponding to the square radius of an origin centered circle increasing from the open interval(5,8) to exactly 8.
CROSSREFS
A000548(n) = (A001481(1 + a(n)/2 ) )/2.
Sequence in context: A112770 A338910 A217514 * A250398 A112774 A352296
KEYWORD
nonn
AUTHOR
Rajan Murthy, Jan 03 2014
STATUS
approved