login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 9 06:07 EST 2021. Contains 349627 sequences. (Running on oeis4.)