Perimeter-magic hexagons of order 3 with magic sum n.

Terms

a(0) =9a(1) =48a(2) =150a(3) =494a(4) =1202a(5) =2542a(6) =4635a(7) =9738a(8) =14943a(9) =25917a(10) =41196a(11) =62518a(12) =89657a(13) =139743a(14) =185114a(15) =264483a(16) =363291a(17) =485411a(18) =630099a(19) =862106a(20) =1067459a(21) =1391011a(22) =1771817a(23) =2210554a(24) =2712337a(25) =3461467a(26) =4115434a(27) =5073010a(28) =6165577a(29) =7387876