Numbers k such that 60*k^2 + 60*k + 1 is a square.

Terms

a(0) =0a(1) =1a(2) =2a(3) =11a(4) =19a(5) =90a(6) =153a(7) =712a(8) =1208a(9) =5609a(10) =9514a(11) =44163a(12) =74907a(13) =347698a(14) =589745a(15) =2737424a(16) =4643056a(17) =21551697a(18) =36554706a(19) =169676155a(20) =287794595a(21) =1335857546a(22) =2265802057a(23) =10517184216a(24) =17838621864a(25) =82801616185a(26) =140443172858a(27) =651895745267