A022030 - cp's OEIS frontend

A022030 For even n, a(n+2) is the greatest integer such that a(n+2)/a(n+1) < a(n+1)/a(n); for odd n, the least integer such that a(n+2)/a(n+1) > a(n+1)/a(n); a(0) = 4, a(1) = 16.

n	a(n)
0	4
1	16
2	63
3	249
4	984
5	3889
6	15370
7	60745
8	240075
9	948819
10	3749901
11	14820274
12	58572352
13	231488326
14	914882931
15	3615779646
16	14290202610
17	56477415835
18	223208766625
19	882160643536
20	3486455360919
21	13779090092886
22	54457408494633
23	215225339261149
24	850608722312629
25	3361756570848769

[4, 16, 63, 249, 984, 3889, 15370, 60745, 240075, 948819, 3749901, 14820274, 58572352, 231488326, 914882931, 3615779646, 14290202610, 56477415835, 223208766625, 882160643536, 3486455360919, 13779090092886, 54457408494633, 215225339261149, 850608722312629, 3361756570848769]

cp's OEIS Frontend

A022030 For even n, a(n+2) is the greatest integer such that a(n+2)/a(n+1) < a(n+1)/a(n); for odd n, the least integer such that a(n+2)/a(n+1) > a(n+1)/a(n); a(0) = 4, a(1) = 16.

Table of values

List of values