Rainbow Squares: a(n) = number of ways to pair the integers 1 to 2n so that the sum of each pair is a square.

A252897

Rainbow Squares: a(n) = number of ways to pair the integers 1 to 2n so that the sum of each pair is a square.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =1a(8) =1a(9) =1a(10) =0a(11) =0a(12) =1a(13) =6a(14) =18a(15) =12a(16) =36a(17) =156a(18) =295a(19) =429a(20) =755a(21) =2603a(22) =7122a(23) =19232a(24) =32818a(25) =54363a(26) =172374a(27) =384053a(28) =933748a(29) =1639656

External references