12723489

Appears in sequences

• Square numbers which equal a triangular number times an odd number between 1 and 15.at n=19A094973
• Perfect squares one less than a triangular number.at n=5A164080
• Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.at n=4A264086
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.at n=32A264090
• Number of (5+1) X (n+1) arrays of permutations of 0..n*6+5 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.at n=3A264094
• Squares that differ from a triangular number by 1.at n=15A299921
• Perfect powers that appear more than once in the Catalan triangle.at n=6A317027