Sum of squares of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly three ways.
A076462
Sum of squares of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly three ways.
Terms
- a(0) =41a(1) =1471a(2) =12938a(3) =62870a(4) =218555a(5) =611821a(6) =1471316a(7) =3161388a(8) =6227565a(9) =11448635a(10) =19895326a(11) =32995586a(12) =52606463a(13) =81092585a(14) =121411240a(15) =177204056a(16) =252895281a(17) =353796663a(18) =486218930a(19) =657589870a(20) =876579011a(21) =1153228901a(22) =1499092988a(23) =1927380100a(24) =2453105525a(25) =3093248691
External references
- oeis: A076462