Coordination sequence for the hypertriangular lattice.

Terms

a(0) =1a(1) =6a(2) =24a(3) =48a(4) =86a(5) =138a(6) =192a(7) =260a(8) =348a(9) =432a(10) =530a(11) =654a(12) =768a(13) =896a(14) =1056a(15) =1200a(16) =1358a(17) =1554a(18) =1728a(19) =1916a(20) =2148a(21) =2352a(22) =2570a(23) =2838a(24) =3072a(25) =3320a(26) =3624a(27) =3888a(28) =4166a(29) =4506