First differences of A309226: distances in A008348 from n-th low point to the next.

Terms

a(0) =3a(1) =5a(2) =13a(3) =35a(4) =89a(5) =221a(6) =579a(7) =1561a(8) =4127a(9) =11143a(10) =30745a(11) =84585a(12) =235913a(13) =659385a(14) =1851883a(15) =5220661a(16) =14776197a(17) =41946423a(18) =119451363a(19) =341007809a(20) =975932453a(21) =2798620993a(22) =8041115863a(23) =23145844263a(24) =66733786153a(25) =192697084389a(26) =557206314727