40723

Appears in sequences

• Least m such that phi(m) = n!.at n=7A055487
• Numbers n such that n and n+4 are both brilliant numbers (A078972).at n=24A083285
• a(n) = (n^3 - 2*n^2 + 3*n + 2)/2.at n=44A189890
• Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,3,4,1 for x=0,1,2,3,4.at n=21A196204
• Number of (n+2) X 4 0..1 matrices with each 3 X 3 subblock idempotent.at n=18A224553
• Number of partitions p of n such that 2*min(p) + (number of parts of p) is not a part of p.at n=40A238542
• Quasi-Carmichael numbers to exactly three bases.at n=16A257753
• Sequence of pairwise relatively prime numbers of class P_8 (see comment in A275246).at n=21A275253
• Number of integer partitions of n such that the upper-left square of the Young diagram has strictly greater graph-distance from the lower-right boundary than any other square.at n=40A325187
• a(n) is the number of unlabeled planar modular lattices on n nodes.at n=16A368461