References to A032123

Number of 2n-bead black-white reversible strings with n black beads.
1, 1, 4, 10, 38, 126, 472, 1716, 6470, 24310, 92504, 352716, 1352540, 5200300


1 seqfan posts

Thu Mar 12 16:47:23 CET 2009    [seqfan] Do the numbers of A032123 always occur exactly five times in Losanitsch's triangle?

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
Links to OEIS content are included according to The OEIS End-User License Agreement .