1,2

J. A. Reeds and P. C. Fishburn, Counting split interval orders, Order, Vol. 18, No. 2, 2001, pp. 129-135.

Cf. A059685, A058259.

Sequence in context: A136127 A111004 A079566 this_sequence A000112 A127083 A131178

Adjacent sequences: A059682 A059683 A059684 this_sequence A059686 A059687 A059688

nonn

N. J. A. Sloane (njas(AT)research.att.com), Feb 05 2001