72891

Appears in sequences

• Molien series for 3-D group R4.at n=25A037243
• a(n) = 81*n^2 - 9.at n=29A157909
• Numbers n such that n+/-2 and n^2+/-2 are all primes.at n=30A189051
• The larger companion to the deficient numbers in A212608.at n=21A212609