22187

Appears in sequences

• 5-wave sequence.at n=34A038201
• G.f.: 1/(1 - 3 x - 3 x^2 + 4 x^3 + x^4 - x^5).at n=8A038342
• Number of reversible string structures with n beads using a maximum of four different colors.at n=10A056323
• a(n) = 12*n^2 - 1.at n=43A158463
• Number of nX3 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=6A304762
• Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=2A304766
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=38A304767
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=42A304767
• Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=2A316510
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=38A316511
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=42A316511
• Numbers in A231626 but not in A343302; first of 5 consecutive deficient numbers in arithmetic progression with common difference > 1.at n=38A343303