22-gonal numbers: a(n) = n*(10*n-9).

Terms

a(0) =0a(1) =1a(2) =22a(3) =63a(4) =124a(5) =205a(6) =306a(7) =427a(8) =568a(9) =729a(10) =910a(11) =1111a(12) =1332a(13) =1573a(14) =1834a(15) =2115a(16) =2416a(17) =2737a(18) =3078a(19) =3439a(20) =3820a(21) =4221a(22) =4642a(23) =5083a(24) =5544a(25) =6025a(26) =6526a(27) =7047a(28) =7588a(29) =8149