Numbers k such that (k, phi(k)) lies on a circle with integral radius centered at the origin, i.e., k^2 + phi(k)^2 is a square.
A066763
Numbers k such that (k, phi(k)) lies on a circle with integral radius centered at the origin, i.e., k^2 + phi(k)^2 is a square.
Terms
- a(0) =15a(1) =45a(2) =70a(3) =75a(4) =135a(5) =140a(6) =225a(7) =280a(8) =350a(9) =375a(10) =377a(11) =405a(12) =490a(13) =560a(14) =627a(15) =665a(16) =675a(17) =700a(18) =980a(19) =1120a(20) =1125a(21) =1215a(22) =1400a(23) =1750a(24) =1875a(25) =1881a(26) =1960a(27) =2025a(28) =2240a(29) =2450
External references
- oeis: A066763