120991

Appears in sequences

• Number of UDUD's in all Dyck paths of semilength n with no UUU's and no DDD's (U=(1,1), D=(1,-1)).at n=14A166290
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element at a city block distance of two, and containing the value n(n+1)/2-2.at n=30A212031