104001

Appears in sequences

• a(1) = 4; a(n) is smallest semiprime > 3*a(n-1).at n=9A117916
• Number of n-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and first differences in -n..n.at n=6A208985
• Number of n-bead necklaces labeled with numbers -7..7 not allowing reversal, with sum zero and first differences in -7..7.at n=6A208992
• Number of 7-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and first differences in -n..n.at n=6A208998
• Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having one or three distinct values for every i<=n and j<=n.at n=11A211499