31438

Appears in sequences

• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-2.at n=21A211958
• Number of length n strings on the alphabet {0,1,2,3} with digit sum at most 4.at n=27A363256