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A086123
a(n) = A004061(n) - 1.
2
2, 6, 10, 12, 46, 126, 148, 180, 618, 928, 3406, 10948, 13240, 13872, 16518, 201358, 396412, 1888278, 3300592
OFFSET
1,1
CROSSREFS
Cf. A004061.
Sequence in context: A108783 A235989 A066679 * A144031 A190055 A184929
KEYWORD
nonn,more
AUTHOR
Labos Elemer, Jul 23 2003
EXTENSIONS
a(16)-a(19) added using the data at A004061 by Amiram Eldar, Jun 04 2024
STATUS
approved