a(n) = solution to the postage stamp problem with 3 denominations and n stamps.

Terms

a(0) =3a(1) =8a(2) =15a(3) =26a(4) =35a(5) =52a(6) =69a(7) =89a(8) =112a(9) =146a(10) =172a(11) =212a(12) =259a(13) =302a(14) =354a(15) =418a(16) =476a(17) =548a(18) =633a(19) =714a(20) =805a(21) =902a(22) =1012a(23) =1127a(24) =1254a(25) =1382a(26) =1524a(27) =1678a(28) =1841a(29) =2010