A306687 - cp's OEIS frontend

A306687 Triangular array read by rows: The sum of squares of the number of common points in all pairs of lattice paths from (0,0) to (x,y), for 0 <= y <= x (the unnormalized second moment).

n	a(n)
0	1
1	4
2	26
3	9
4	92
5	474
6	16
7	240
8	1704
9	8084
10	25
11	520
12	4879
13	29560
14	134450
15	36
16	994
17	11928
18	89928
19	498140
20	2208612
21	49
22	1736
23	25956
24	238440
25	1580810
26	8265432
27	36024884
28	64
29	2832
30	51648
31	568128
32	4442768
33	27055808
34	135873360
35	584988840
36	81
37	4380
38	95733
39	1242648
40	11320595
41	79443000
42	455434875
43	2220096240
44	9470766690

[1, 4, 26, 9, 92, 474, 16, 240, 1704, 8084, 25, 520, 4879, 29560, 134450, 36, 994, 11928, 89928, 498140, 2208612, 49, 1736, 25956, 238440, 1580810, 8265432, 36024884, 64, 2832, 51648, 568128, 4442768, 27055808, 135873360, 584988840, 81, 4380, 95733, 1242648, 11320595, 79443000, 455434875, 2220096240, 9470766690]

cp's OEIS Frontend

A306687 Triangular array read by rows: The sum of squares of the number of common points in all pairs of lattice paths from (0,0) to (x,y), for 0 <= y <= x (the unnormalized second moment).

Table of values

List of values