The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A333212 Lengths of maximal weakly decreasing subsequences in the sequence of prime gaps (A001223). 12
 1, 2, 2, 2, 1, 2, 3, 1, 3, 3, 2, 1, 3, 2, 1, 2, 2, 2, 3, 3, 2, 2, 4, 1, 2, 5, 3, 1, 3, 1, 2, 2, 1, 1, 4, 1, 2, 1, 2, 2, 2, 1, 3, 1, 3, 2, 1, 2, 2, 4, 1, 4, 4, 3, 1, 3, 2, 1, 1, 2, 5, 3, 2, 2, 2, 2, 2, 1, 3, 1, 3, 1, 2, 1, 3, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 1, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Prime gaps are differences between adjacent prime numbers. LINKS Table of n, a(n) for n=1..87. FORMULA Ones correspond to weak prime quartets A054819, so the sum of terms up to but not including the n-th one is A000720(A054819(n - 1)). EXAMPLE The prime gaps split into the following weakly decreasing subsequences: (1), (2,2), (4,2), (4,2), (4), (6,2), (6,4,2), (4), (6,6,2), (6,4,2), (6,4), (6), ... MATHEMATICA Length/@Split[Differences[Array[Prime, 100]], #1>=#2&]//Most CROSSREFS First differences of A258025 (with zero prepended). The version for the Kolakoski sequence is A332273. The weakly increasing version is A333215. The unequal version is A333216. The strictly decreasing version is A333252. The strictly increasing version is A333253. The equal version is A333254. Prime gaps are A001223. Positions of adjacent equal differences are A064113. Weakly decreasing runs of compositions in standard order are A124765. Positions of strict ascents in the sequence of prime gaps are A258025. Cf. A000040, A000720, A001221, A036263, A054819, A084758, A114994, A124760, A124761, A124768, A333213, A333214. Sequence in context: A120965 A151931 A185636 * A182597 A290491 A194314 Adjacent sequences: A333209 A333210 A333211 * A333213 A333214 A333215 KEYWORD nonn AUTHOR Gus Wiseman, Mar 14 2020 STATUS approved

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

Last modified September 29 00:22 EDT 2023. Contains 365739 sequences. (Running on oeis4.)