A347595 - cp's OEIS frontend

A347595 a(0) = 1; for n>0, a(n) is the smallest positive integer that has not previously occurred such that a(n-1)^2 + n^2 + a(n) is a square.

n	a(n)
0	1
1	2
2	8
3	27
4	39
5	54
6	73
7	98
8	133
9	186
10	273
11	426
12	709
13	1250
14	2305
15	4386
16	8517
17	16746
18	33169
19	65978
20	131557
21	262674
22	524865
23	1049202
24	2097829
25	4195034
26	8389393
27	16778058
28	33555333
29	67109826
30	134218753
31	268436546
32	536872069
33	1073743050
34	2147484945
35	4294968666
36	8589936037
37	17179870706

[1, 2, 8, 27, 39, 54, 73, 98, 133, 186, 273, 426, 709, 1250, 2305, 4386, 8517, 16746, 33169, 65978, 131557, 262674, 524865, 1049202, 2097829, 4195034, 8389393, 16778058, 33555333, 67109826, 134218753, 268436546, 536872069, 1073743050, 2147484945, 4294968666, 8589936037, 17179870706]

cp's OEIS Frontend

A347595 a(0) = 1; for n>0, a(n) is the smallest positive integer that has not previously occurred such that a(n-1)^2 + n^2 + a(n) is a square.

Table of values

List of values