Number of solutions to c(1)t(1) + ... + c(n)t(n) = 0, where c(i) = +-1 for i>1, c(1) = t(1) = 1, t(i) = triangular numbers (A000217).
A058498
Number of solutions to c(1)t(1) + ... + c(n)t(n) = 0, where c(i) = +-1 for i>1, c(1) = t(1) = 1, t(i) = triangular numbers (A000217).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =1a(6) =1a(7) =2a(8) =0a(9) =6a(10) =8a(11) =13a(12) =0a(13) =33a(14) =52a(15) =105a(16) =0a(17) =310a(18) =485a(19) =874a(20) =0a(21) =2974a(22) =5240a(23) =9488a(24) =0a(25) =30418a(26) =55715a(27) =104730a(28) =0a(29) =352467
External references
- oeis: A058498