A022018 - cp's OEIS frontend

A022018 Define the sequence UD(a(0),a(1)) by a(n) is the least integer such that a(n)/a(n-1) > a(n-1)/a(n-2)+1 for even n >= 2 and such that a(n)/a(n-1) > a(n-1)/a(n-2) for odd n>=2. This is UD(2,16).

n	a(n)
0	2
1	16
2	129
3	1040
4	8385
5	67604
6	545057
7	4394520
8	35430801
9	285660700
10	2303138321
11	18569044064
12	149712848033
13	1207059275044
14	9731910872129
15	78463494859944
16	632611632651505
17	5100428912583468
18	41122188953879473
19	331547494013013232
20	2673100425407651457

[2, 16, 129, 1040, 8385, 67604, 545057, 4394520, 35430801, 285660700, 2303138321, 18569044064, 149712848033, 1207059275044, 9731910872129, 78463494859944, 632611632651505, 5100428912583468, 41122188953879473, 331547494013013232, 2673100425407651457]

cp's OEIS Frontend

A022018 Define the sequence UD(a(0),a(1)) by a(n) is the least integer such that a(n)/a(n-1) > a(n-1)/a(n-2)+1 for even n >= 2 and such that a(n)/a(n-1) > a(n-1)/a(n-2) for odd n>=2. This is UD(2,16).

Table of values

List of values