467556domain: NAppears in sequencesValues of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,31.at n=31A064252Number of dumbbells in all possible arrangements of dumbbells on a 2 X n rectangular array of compartments.at n=9A123518