The Pnictogen sequence: a(n) = A018227(n)-3.

Terms

a(0) =7a(1) =15a(2) =33a(3) =51a(4) =83a(5) =115a(6) =165a(7) =215a(8) =287a(9) =359a(10) =457a(11) =555a(12) =683a(13) =811a(14) =973a(15) =1135a(16) =1335a(17) =1535a(18) =1777a(19) =2019a(20) =2307a(21) =2595a(22) =2933a(23) =3271a(24) =3663a(25) =4055a(26) =4505a(27) =4955a(28) =5467a(29) =5979