A227965 - cp's OEIS frontend

A227965 a(1) = least k such that 1 + 1/2 < H(k) - H(2); a(2) = least k such that H(a(1)) - 1/2 < H(k) -H(a(1)), and for n > 2, a(n) = least k such that H(a(n-1)) - H(a(n-2)) > H(k) - H(a(n-1)), where H = harmonic number.

n	a(n)
1	11
2	53
3	249
4	1164
5	5435
6	25371
7	118428
8	552798
9	2580343
10	12044484
11	56221045
12	262427666
13	1224955522
14	5717827134
15	26689578960
16	124581175389
17	581517950673
18	2714399875409
19	12670230858892
20	59141894115145
21	276061555506087
22	1288595564424512
23	6014885070144844

[11, 53, 249, 1164, 5435, 25371, 118428, 552798, 2580343, 12044484, 56221045, 262427666, 1224955522, 5717827134, 26689578960, 124581175389, 581517950673, 2714399875409, 12670230858892, 59141894115145, 276061555506087, 1288595564424512, 6014885070144844]

cp's OEIS Frontend

A227965 a(1) = least k such that 1 + 1/2 < H(k) - H(2); a(2) = least k such that H(a(1)) - 1/2 < H(k) -H(a(1)), and for n > 2, a(n) = least k such that H(a(n-1)) - H(a(n-2)) > H(k) - H(a(n-1)), where H = harmonic number.

Table of values

List of values