Harary index of the n X n white bishop graph.

Terms

a(0) =1a(1) =5a(2) =21a(3) =47a(4) =104a(5) =182a(6) =318a(7) =490a(8) =755a(9) =1075a(10) =1531a(11) =2065a(12) =2786a(13) =3612a(14) =4684a(15) =5892a(16) =7413a(17) =9105a(18) =11185a(19) =13475a(20) =16236a(21) =19250a(22) =22826a(23) =26702a(24) =31239a(25) =36127a(26) =41783a(27) =47845a(28) =54790a(29) =62200