a(n) is the sum of lattice points enumerated by the square number spiral falling on the circumference of circles centered at the origin of radii n.
A309573
a(n) is the sum of lattice points enumerated by the square number spiral falling on the circumference of circles centered at the origin of radii n.
Terms
- a(0) =0a(1) =16a(2) =64a(3) =144a(4) =256a(5) =912a(6) =576a(7) =784a(8) =1024a(9) =1296a(10) =3648a(11) =1936a(12) =2304a(13) =7312a(14) =3136a(15) =8208a(16) =4096a(17) =11824a(18) =5184a(19) =5776a(20) =14592a(21) =7056a(22) =7744a(23) =8464a(24) =9216a(25) =41232a(26) =29248a(27) =11664a(28) =12544a(29) =27568
External references
- oeis: A309573