Number of tetrahedra in the n X n black bishop graph.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =10a(5) =27a(6) =90a(7) =182a(8) =412a(9) =714a(10) =1324a(11) =2079a(12) =3414a(13) =5005a(14) =7574a(15) =10556a(16) =15064a(17) =20196a(18) =27576a(19) =35853a(20) =47298a(21) =59983a(22) =76978a(23) =95634a(24) =119988a(25) =146510a(26) =180388a(27) =217035a(28) =262990a(29) =312417