89981domain: NAppears in sequencesa(n) = T(n, 2*n-7), T given by A027926.at n=16A027930Truncated square pyramid numbers: a(n) = Sum_{k = n..2*n-1} k^2.at n=34A050410Numbers k such that there is more than one possible solution for A367338(k).at n=27A367346