0,3
Cf. A041724.
Sequence in context: A154596 A066382 A139387 * A077544 A087480 A060059
Adjacent sequences: A041722 A041723 A041724 * A041726 A041727 A041728
nonn,cofr,easy
N. J. A. Sloane (njas(AT)research.att.com).