A228016 - cp's OEIS frontend

A228016 a(1) = least k such that 1/1+1/2+1/3+1/4+1/5 < H(k) - H(5); a(2) = least k such that H(a(1)) - H(5) < 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	54
2	539
3	5340
4	52865
5	523314
6	5180279
7	51279480
8	507614525
9	5024865774
10	49741043219
11	492385566420
12	4874114620985
13	48248760643434
14	477613491813359
15	4727886157490160
16	46801248083088245
17	463284594673392294
18	4586044698650834699
19	45397162391834954700

[54, 539, 5340, 52865, 523314, 5180279, 51279480, 507614525, 5024865774, 49741043219, 492385566420, 4874114620985, 48248760643434, 477613491813359, 4727886157490160, 46801248083088245, 463284594673392294, 4586044698650834699, 45397162391834954700]

cp's OEIS Frontend

A228016 a(1) = least k such that 1/1+1/2+1/3+1/4+1/5 < H(k) - H(5); a(2) = least k such that H(a(1)) - H(5) < 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