A235142 Positions of A235141, the first differences of A234300, which equal -1.

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.

Links

Table of n, a(n) for n=1..41.

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.

Cf. A235141, A234300.

Sequence in context: A112770 A338910 A217514 * A250398 A112774 A352296

Adjacent sequences: A235139 A235140 A235141 * A235143 A235144 A235145

Keyword

nonn

Author

Rajan Murthy, Jan 03 2014

Status

approved