A179835Smallest k > 0 such that prime(n-k) + prime(n+k) = 2*prime(n), or 0 if there is no such k.
0, 0, 1, 0, 2, 2, 2, 0, 0, 3, 3, 6, 3, 0, 0, 1, …
The first 4 terms appear at position 9,984.
…5358979323846264338327950288419716939937510582097…
…39360726024914127372458700660631558817488152092096…
…925409171536436789259036001133053054882046652138414…
…3699989225695968815920560010165525637567856672279661…
…81543194019557685043724800102041374983187225967738715…
…092048786834138155836860001022139317162938175161481422…
…6333969486556566849742850010222533322510831087350037627…
…10815862560416533340415800102220178360893390642104326099…
…112935607048005364864404001022200336193364197917053013395…
…1129356070480053648644040010222003361933641979170530133950…
…11293560704800536486440400102220033619336419791705301339504…
…112935607048005364864404001022200336193364197917053013395046…
| terms | string | first position | occurrences |
|---|---|---|---|
| 1 | 0 | 32 | 99,993,942 |
| 2 | 00 | 307 | 10,004,524 |
| 3 | 001 | 360 | 1,000,758 |
| 4 | 0010 | 9,984 | 100,004 |
| 5 | 00102 | 28,181 | 10,101 |
| 6 | 001022 | 1,037,932 | 991 |
| 7 | 0010222 | 7,904,592 | 94 |
| 8 | 00102220 | 63,919,779 | 10 |
| 9 | 001022200 | 185,259,080 | 1 |
| 10 | 0010222003 | 185,259,080 | 1 |
| 11 | 00102220033 | 185,259,080 | 1 |
| 12 | 001022200336 | 185,259,080 | 1 |
Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.