67956

Appears in sequences

• Convolution of A000203 with itself.at n=53A000385
• a(n) = A012249(2*n) / 2^(2*n-1).at n=4A012250
• Number of trees on n nodes with forbidden limbs.at n=18A014265
• Number of trees on n nodes with forbidden limbs.at n=18A014266
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,13.at n=20A064243
• Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,65.at n=6A065700
• Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2.at n=3A217224
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2.at n=24A217227