Main diagonal of Unlucky array: a(n) = A255543(n,n).

Terms

a(0) =2a(1) =11a(2) =61a(3) =121a(4) =253a(5) =379a(6) =663a(7) =945a(8) =1377a(9) =1687a(10) =2143a(11) =2803a(12) =3543a(13) =4053a(14) =5485a(15) =6315a(16) =7023a(17) =7987a(18) =8781a(19) =9871a(20) =11559a(21) =13105a(22) =14743a(23) =16485a(24) =18337a(25) =19959a(26) =23073a(27) =24511a(28) =26371a(29) =27895