12931216

Appears in sequences

• Number of city-block distance 1, pressure limit 2 movements in an n X n array with each element moving exactly one horizontally or vertically and no element acquiring more than two neighbors.at n=3A217021
• Number of city-block distance 1, pressure limit 2 movements in an nX4 array with each element moving exactly one horizontally or vertically and no element acquiring more than two neighbors.at n=3A217024
• T(n,k)=Number of city-block distance 1, pressure limit 2 movements in an nXk array with each element moving exactly one horizontally or vertically and no element acquiring more than two neighbors.at n=24A217028
• Primitive coreful weird numbers: powerful numbers k that are coreful abundant (A308053) but no subset of their aliquot coreful divisors sums to k.at n=2A391142