Sum of three consecutive squares: a(n) = n^2 + (n + 1)^2 + (n + 2)^2.

Terms

a(0) =2a(1) =5a(2) =14a(3) =29a(4) =50a(5) =77a(6) =110a(7) =149a(8) =194a(9) =245a(10) =302a(11) =365a(12) =434a(13) =509a(14) =590a(15) =677a(16) =770a(17) =869a(18) =974a(19) =1085a(20) =1202a(21) =1325a(22) =1454a(23) =1589a(24) =1730a(25) =1877a(26) =2030a(27) =2189a(28) =2354a(29) =2525