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A235386 Positions of A235141, the first differences of A234300, which equal 1. 3
1, 5, 11, 23, 33, 65, 85, 109, 133, 187, 215, 285, 361, 447, 491, 591, 643, 695, 747, 931, 991, 1193, 1267, 1343, 1569, 1739, 2087, 2181, 2277, 2471, 2573, 2669, 2781, 3327, 3557, 3681, 3923, 4299, 4431, 4561, 4833, 4969 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The positions reflect square radii which are uniquely twice a square integer, that is, the inclusion of only one square on the y = x line.

LINKS

Table of n, a(n) for n=1..42.

FORMULA

a(n+1) = A235142(n) + 1 , a(1)=1.

EXAMPLE

for n=3, a(3) = 11.  The eleventh term of A235141 is 1 reflecting an increase in the square radius of the circle from exactly 8 to the open interval of (8,9).

CROSSREFS

A000548(n) = (A001481(1 + (a(n+1)-1)/2)/2.

Cf. A235141, A234300.

Sequence in context: A167610 A295149 A143127 * A061769 A169744 A190148

Adjacent sequences:  A235383 A235384 A235385 * A235387 A235388 A235389

KEYWORD

nonn

AUTHOR

Rajan Murthy, Jan 08 2014

STATUS

approved

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Last modified June 6 17:01 EDT 2020. Contains 334829 sequences. (Running on oeis4.)