a(n) = sum of squares of numbers < 2^n having exactly 2 ones in their binary representation.
A110202
a(n) = sum of squares of numbers < 2^n having exactly 2 ones in their binary representation.
Terms
- a(0) =0a(1) =9a(2) =70a(3) =395a(4) =1984a(5) =9429a(6) =43434a(7) =196095a(8) =872788a(9) =3842729a(10) =16773118a(11) =72693075a(12) =313158312a(13) =1342144509a(14) =5726557522a(15) =24338016935a(16) =103078952956a(17) =435222828369
External references
- oeis: A110202