a(n) is the index of the smallest n-gonal number with exactly n prime factors (counted with multiplicity).

A359014

a(n) is the index of the smallest n-gonal number with exactly n prime factors (counted with multiplicity).

Terms

    a(0) =7a(1) =4a(2) =11a(3) =50a(4) =60a(5) =22a(6) =315a(7) =264a(8) =1295a(9) =256a(10) =315a(11) =4480a(12) =4727a(13) =2634a(14) =25123a(15) =8192a(16) =15903a(17) =18432a(18) =314315a(19) =368640a(20) =1859975a(21) =95326a(22) =2068659a(23) =3145728a(24) =2181039a(25) =1028412a(26) =23612379a(27) =83886080a(28) =18512791a(29) =72421650

External references