271287

Appears in sequences

• Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1111-0001 pattern in any orientation.at n=19A146606
• The number of switching equivalent classes of cube root edge weighted graphs.at n=7A240973
• Number of length n 1..(1+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=41A254820