104730

Appears in sequences

• [ exp(21/22)*n! ].at n=7A030829
• Number of solutions to c(1)t(1) + ... + c(n)t(n) = 0, where c(i) = +-1 for i>1, c(1) = t(1) = 1, t(i) = triangular numbers (A000217).at n=27A058498
• Number of ways of partitioning the set of the first n positive triangular numbers into two subsets whose sums differ at most by 1.at n=28A308682
• Number of (n+2) X (n+2) symmetric matrices with nonnegative integer entries, trace 0, with n rows that sum to 2, and 2 rows that sum to 1.at n=8A345132