Permutation of natural numbers: a(1) = 1; a(2n) = nontriangular(a(n)), a(2n+1) = triangular(1+a(n)), where triangular = A000217, nontriangular = A014132.
A257798
Permutation of natural numbers: a(1) = 1; a(2n) = nontriangular(a(n)), a(2n+1) = triangular(1+a(n)), where triangular = A000217, nontriangular = A014132.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =5a(6) =10a(7) =7a(8) =15a(9) =9a(10) =28a(11) =8a(12) =21a(13) =14a(14) =66a(15) =11a(16) =36a(17) =20a(18) =136a(19) =13a(20) =55a(21) =35a(22) =435a(23) =12a(24) =45a(25) =27a(26) =253a(27) =19a(28) =120a(29) =77
External references
- oeis: A257798