a(1)=1; thereafter a(n) = smallest square m^2 such that m^2 minus (sum of all previous terms) is prime.
A249567
a(1)=1; thereafter a(n) = smallest square m^2 such that m^2 minus (sum of all previous terms) is prime.
Terms
- a(0) =1a(1) =4a(2) =16a(3) =64a(4) =144a(5) =576a(6) =1296a(7) =3600a(8) =6084a(9) =15876a(10) =28224a(11) =82944a(12) =147456a(13) =298116a(14) =627264a(15) =1218816a(16) =2433600a(17) =4928400a(18) =9809424a(19) =19607184a(20) =39237696a(21) =78535044a(22) =158155776a(23) =316057284a(24) =633830976a(25) =1265509476a(26) =2532303684a(27) =5062891716a(28) =10128007044a(29) =20260106244
External references
- oeis: A249567