87390domain: NAppears in sequencesPartial sums of A005578.at n=17A086445Even numbers k such that 6k+1, 12k+1, 18k+1, 36k+1 and 72k+1 are all primes.at n=21A206349Sum of the largest parts in the partitions of 3n into 3 parts.at n=39A236370Numbers m such that 6m+1, 12m+1, 18m+1, 36m+1 and 72m+1 are all prime.at n=34A257035