Number of solutions to variant of triples version of Langford (or Langford-Skolem) problem.
A059108
Number of solutions to variant of triples version of Langford (or Langford-Skolem) problem.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =9a(10) =20a(11) =33a(12) =0a(13) =0a(14) =0a(15) =0a(16) =0a(17) =0a(18) =200343a(19) =869006a(20) =4247790a(21) =0a(22) =0a(23) =0a(24) =0a(25) =0a(26) =0
External references
- oeis: A059108