a(0) = 1; for n>0, a(n) is the smallest positive integer that has not previously occurred such that a(n-1)^2 + n^2 + a(n) is a square.

A347595

a(0) = 1; for n>0, a(n) is the smallest positive integer that has not previously occurred such that a(n-1)^2 + n^2 + a(n) is a square.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =27a(4) =39a(5) =54a(6) =73a(7) =98a(8) =133a(9) =186a(10) =273a(11) =426a(12) =709a(13) =1250a(14) =2305a(15) =4386a(16) =8517a(17) =16746a(18) =33169a(19) =65978a(20) =131557a(21) =262674a(22) =524865a(23) =1049202a(24) =2097829a(25) =4195034a(26) =8389393a(27) =16778058a(28) =33555333a(29) =67109826

External references