26794

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 21.at n=10A031609
• Number of asymmetric mobiles (circular rooted trees) with n nodes and 3 leaves.at n=31A055364
• First of two complementary trees generated by the triangular numbers. The second tree is A183232.at n=15A183231
• Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.at n=4A234154
• Number of (n+1)X(5+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.at n=0A234158
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.at n=10A234161
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.at n=14A234161
• Sum of the largest parts in the partitions of 3n into 3 parts.at n=26A236370