login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A270711 Half of increasing gaps between primes. 0
1, 2, 3, 4, 7, 9, 10, 11, 17, 18, 22, 26, 36, 43, 48, 56, 57, 59, 66, 74, 77, 90, 105, 110, 111, 117, 124, 125, 141, 144, 146, 160, 168, 177, 191, 192, 197, 228, 232, 234, 237, 243, 245, 250, 257, 258, 266, 267, 270, 291, 294, 301, 326 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

The primes in this sequence are 2, 3, 7, 11, 17, 43, 59, 191, 197, 257, ...

The squares are 1, 4, 9, 36, 144,...

LINKS

Table of n, a(n) for n=2..54.

FORMULA

a(n) = A005250(n)/2 for n>1.

MATHEMATICA

max = 10^7; Module[{d = Differences[Prime[Range[max]]], ls = {2}}, Table[If[d[[n]] > Last[ls], AppendTo[ls, d[[n]]]], {n, max - 1}]; ls/2]

CROSSREFS

Cf. A005250.

Sequence in context: A060253 A066276 A047340 * A096118 A050029 A137451

Adjacent sequences:  A270708 A270709 A270710 * A270712 A270713 A270714

KEYWORD

nonn,easy

AUTHOR

Michel Lagneau, Mar 22 2016

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 16 10:09 EDT 2018. Contains 316262 sequences. (Running on oeis4.)