A086123 a(n) = A004061(n) - 1.

2, 6, 10, 12, 46, 126, 148, 180, 618, 928, 3406, 10948, 13240, 13872, 16518, 201358, 396412, 1888278, 3300592

Offset: 1

Author

Labos Elemer, Jul 23 2003

Keywords

• nonn
• more

Crossrefs

Cf. A004061.

Extensions

a(16)-a(19) added using the data at A004061 by Amiram Eldar, Jun 04 2024