Number of ways of pairing the even squares of the numbers 1 to n with the odd squares of the numbers n+1 to 2n such that each pair sums to a prime. a(1) is defined to be 1.
A077764
Number of ways of pairing the even squares of the numbers 1 to n with the odd squares of the numbers n+1 to 2n such that each pair sums to a prime. a(1) is defined to be 1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =2a(9) =4a(10) =4a(11) =8a(12) =6a(13) =14a(14) =14a(15) =44a(16) =22a(17) =30a(18) =12a(19) =41a(20) =137a(21) =667a(22) =401a(23) =517a(24) =149a(25) =286a(26) =306a(27) =1312a(28) =1940a(29) =23546
External references
- oeis: A077764