74260

Appears in sequences

• Number of nXnXn triangular 0..4 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors.at n=3A214380
• T(n,k)=Number of nXnXn triangular 0..k arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors.at n=24A214384
• Number of 4X4X4 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors.at n=3A214386
• a(n) is the smallest centered triangular number divisible by exactly n centered triangular numbers.at n=5A359231
• Centered triangular numbers that are pseudoperfect (semiperfect).at n=15A377747