Main diagonal of A332367, divided by 4.

Terms

a(0) =1a(1) =5a(2) =13a(3) =31a(4) =57a(5) =107a(6) =173a(7) =275a(8) =401a(9) =599a(10) =837a(11) =1143a(12) =1497a(13) =1995a(14) =2565a(15) =3279a(16) =4081a(17) =5091a(18) =6213a(19) =7535a(20) =8985a(21) =10803a(22) =12789a(23) =15047a(24) =17489a(25) =20451a(26) =23645a(27) =27251a(28) =31113a(29) =35487