A002315 - cp's OEIS frontend

A002315 NSW numbers: a(n) = 6a(n-1) - a(n-2); also a(n)^2 - 2b(n)^2 = -1 with b(n) = A001653(n+1).

n	a(n)
0	1
1	7
2	41
3	239
4	1393
5	8119
6	47321
7	275807
8	1607521
9	9369319
10	54608393
11	318281039
12	1855077841
13	10812186007
14	63018038201
15	367296043199
16	2140758220993
17	12477253282759
18	72722761475561
19	423859315570607
20	2470433131948081
21	14398739476117879
22	83922003724759193

[1, 7, 41, 239, 1393, 8119, 47321, 275807, 1607521, 9369319, 54608393, 318281039, 1855077841, 10812186007, 63018038201, 367296043199, 2140758220993, 12477253282759, 72722761475561, 423859315570607, 2470433131948081, 14398739476117879, 83922003724759193]

cp's OEIS Frontend

A002315 NSW numbers: a(n) = 6a(n-1) - a(n-2); also a(n)^2 - 2b(n)^2 = -1 with b(n) = A001653(n+1).

Table of values

List of values

cp's OEIS Frontend

A002315 NSW numbers: a(n) = 6*a(n-1) - a(n-2); also a(n)^2 - 2*b(n)^2 = -1 with b(n) = A001653(n+1).

Table of values

List of values

A002315 NSW numbers: a(n) = 6a(n-1) - a(n-2); also a(n)^2 - 2b(n)^2 = -1 with b(n) = A001653(n+1).