Second 10-gonal (or decagonal) numbers: n*(4*n+3).

Terms

a(0) =0a(1) =7a(2) =22a(3) =45a(4) =76a(5) =115a(6) =162a(7) =217a(8) =280a(9) =351a(10) =430a(11) =517a(12) =612a(13) =715a(14) =826a(15) =945a(16) =1072a(17) =1207a(18) =1350a(19) =1501a(20) =1660a(21) =1827a(22) =2002a(23) =2185a(24) =2376a(25) =2575a(26) =2782a(27) =2997a(28) =3220a(29) =3451