115069

Appears in sequences

• Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having a sum in 2..7.at n=3A186788
• Half the number of (n+2)X6 binary arrays with each 3X3 subblock having a sum in 2..7.at n=0A186791
• T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a sum in 2..7.at n=6A186796
• T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a sum in 2..7.at n=9A186796
• The number of subsets X of Zn such that for all u, v in X, u+v is not in X.at n=32A206702
• Composite numbers k such that if k = a U b (where U denotes concatenation) then a' + b' = k', where a', b' and k' are the arithmetic derivatives of a, b and k.at n=17A239724
• Composite numbers k = concat(MSD(k),x) such that k' = x', where k' is the arithmetic derivative of k.at n=21A293477
• Composite numbers k = concat(MSD(k),x) such that the sum of the aliquot parts of k is equal to the sum of the aliquot parts of x.at n=24A293479