143255

Appears in sequences

• Number of n-node unrooted steric quartic trees; number of n-carbon alkanes C(n)H(2n+2) taking stereoisomers into account.at n=17A000628
• Number of unrooted steric quartic trees with n (unlabeled) nodes and possessing a centroid; number of n carbon alkanes C(n)H(2n +2) with a centroid when stereoisomers are regarded as different.at n=16A086194
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-0001 pattern in any orientation.at n=15A146853
• Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and an odd number of 1's in each row or column.at n=6A162055