1150920domain: NAppears in sequencesNumbers m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,53.at n=28A065695Number of compositions of n with difference -3 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=19A242838