The first of 33 consecutive positive integers the sum of the squares of which is a square.

Terms

a(0) =7a(1) =27a(2) =60a(3) =181a(4) =227a(5) =612a(6) =1085a(7) =1985a(8) =3492a(9) =9047a(10) =11161a(11) =28860a(12) =50607a(13) =91987a(14) =161276a(15) =416685a(16) =513883a(17) =1327652a(18) =2327541a(19) =4230121a(20) =7415908a(21) =19159167a(22) =23628161a(23) =61043836a(24) =107016983a(25) =194494283a(26) =340971196a(27) =880905701a(28) =1086382227a(29) =2806689508