A212503 - cp's OEIS frontend

A212503 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<2z.

n	a(n)
0	0
1	1
2	9
3	49
4	144
5	361
6	729
7	1369
8	2304
9	3721
10	5625
11	8281
12	11664
13	16129
14	21609
15	28561
16	36864
17	47089
18	59049
19	73441
20	90000
21	109561
22	131769
23	157609
24	186624
25	219961
26	257049
27	299209
28	345744
29	398161
30	455625
31	519841
32	589824
33	667489
34	751689

[0, 1, 9, 49, 144, 361, 729, 1369, 2304, 3721, 5625, 8281, 11664, 16129, 21609, 28561, 36864, 47089, 59049, 73441, 90000, 109561, 131769, 157609, 186624, 219961, 257049, 299209, 345744, 398161, 455625, 519841, 589824, 667489, 751689]

cp's OEIS Frontend

A212503 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<2z.

Table of values

List of values