1,2
Cf. A016730, A120754, A129935.
Sequence in context: A174418 A072246 A024781 * A111183 A192648 A048112
Adjacent sequences: A120752 A120753 A120754 * A120756 A120757 A120758
nonn
N. J. A. Sloane (njas(AT)research.att.com), Jun 08 2007