2*JacobiSymbol(p,5) mod p^2 for p=prime(n).

Terms

a(0) =2a(1) =7a(2) =0a(3) =47a(4) =2a(5) =167a(6) =287a(7) =2a(8) =527a(9) =2a(10) =2a(11) =1367a(12) =2a(13) =1847a(14) =2207a(15) =2807a(16) =2a(17) =2a(18) =4487a(19) =2a(20) =5327a(21) =2a(22) =6887a(23) =2a(24) =9407a(25) =2a(26) =10607a(27) =11447a(28) =2a(29) =12767