A212053 - cp's OEIS frontend

A212053 Number of (w,x,y,z) with all terms in {1,...,n} and wx<=yz+1.

n	a(n)
0	0
1	1
2	13
3	56
4	158
5	365
6	725
7	1312
8	2198
9	3477
10	5245
11	7624
12	10742
13	14725
14	19725
15	25920
16	33470
17	42557
18	53397
19	66176
20	81150
21	98525
22	118533
23	141456
24	167606
25	197189
26	230509
27	267920
28	309726
29	356205
30	407805
31	464744
32	527494
33	596389
34	671789

[0, 1, 13, 56, 158, 365, 725, 1312, 2198, 3477, 5245, 7624, 10742, 14725, 19725, 25920, 33470, 42557, 53397, 66176, 81150, 98525, 118533, 141456, 167606, 197189, 230509, 267920, 309726, 356205, 407805, 464744, 527494, 596389, 671789]

cp's OEIS Frontend

A212053 Number of (w,x,y,z) with all terms in {1,...,n} and wx<=yz+1.

Table of values

List of values

cp's OEIS Frontend

A212053 Number of (w,x,y,z) with all terms in {1,...,n} and w*x<=y*z+1.

Table of values

List of values

A212053 Number of (w,x,y,z) with all terms in {1,...,n} and wx<=yz+1.