Main diagonal of array in A358304, divided by 2.

Terms

a(0) =0a(1) =1a(2) =5a(3) =16a(4) =33a(5) =67a(6) =102a(7) =171a(8) =241a(9) =346a(10) =452a(11) =627a(12) =769a(13) =1015a(14) =1228a(15) =1512a(16) =1796a(17) =2220a(18) =2541a(19) =3072a(20) =3500a(21) =4070a(22) =4605a(23) =5386a(24) =5958a(25) =6848a(26) =7598a(27) =8561a(28) =9419a(29) =10665