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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

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Last modified January 19 03:38 EST 2019. Contains 319283 sequences. (Running on oeis4.)