A108658 - cp's OEIS frontend

A108658 Number of the essentially different permutations of the numbers 0 to n such that the sum of adjacent numbers is a square.

n	a(n)
0	1
1	1
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	3
16	4
17	4
18	0
19	0
20	4
21	5
22	2
23	8
24	7
25	47
26	72
27	135
28	283
29	158
30	164
31	1948
32	1467
33	2998
34	20561
35	66700
36	130236
37	153058
38	181635
39	239386
40	343189
41	1600832
42	5001577
43	16859525
44	45119463
45	66785667
46	218923884
47	393626778
48	665307164
49	3111228585
50	2156371427

[1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 4, 4, 0, 0, 4, 5, 2, 8, 7, 47, 72, 135, 283, 158, 164, 1948, 1467, 2998, 20561, 66700, 130236, 153058, 181635, 239386, 343189, 1600832, 5001577, 16859525, 45119463, 66785667, 218923884, 393626778, 665307164, 3111228585, 2156371427]

cp's OEIS Frontend

A108658 Number of the essentially different permutations of the numbers 0 to n such that the sum of adjacent numbers is a square.

Table of values

List of values