Number of ways of pairing even numbers in the range 1 to n with odd numbers in the range n+1 to 2n such that each pair sums to a prime.
A071059
Number of ways of pairing even numbers in the range 1 to n with odd numbers in the range n+1 to 2n such that each pair sums to a prime.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =2a(7) =6a(8) =4a(9) =7a(10) =6a(11) =11a(12) =11a(13) =53a(14) =53a(15) =181a(16) =171a(17) =939a(18) =925a(19) =4432a(20) =4545a(21) =15811a(22) =15583a(23) =67891a(24) =68193a(25) =434963a(26) =388975a(27) =2718150a(28) =3113343a(29) =21580655
External references
- oeis: A071059