Index of n-th low point in A022837.

Terms

a(0) =2a(1) =5a(2) =12a(3) =29a(4) =78a(5) =199a(6) =508a(7) =1355a(8) =3592a(9) =9589a(10) =25752a(11) =70579a(12) =194228a(13) =539961a(14) =1507602a(15) =4228745a(16) =11913940a(17) =33690443a(18) =95581182a(19) =272003821a(20) =776082524a(21) =2219823175a(22) =6363074656