592416

Appears in sequences

• a(n) = n^2 * (n^2 - 1)/2.at n=32A083374
• Triangular numbers which are 10-almost primes.at n=8A101744
• a(n) = n*(n+1)*(n+2)*(n+4)*(n+23)/120.at n=31A101855
• Half the number of nX5 binary arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors.at n=6A183401
• Let T(n) = n(n+1)/2 be the n-th triangular number (A000217); a(n) = T(8T(n)).at n=16A185096
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and odd trace.at n=32A210379
• Triangular numbers that are the product of a triangular number and a square number (both greater than 1).at n=16A253650
• Number of nX4 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=3A280281
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=24A280284
• Triangular numbers such that the three numbers before it and the three numbers after it are squarefree.at n=28A374393