Consider a triangle in which the 2n-th row contains first 2n positive integers in increasing order and the (2n+1)-st row contains first 2n+1 positive integers in decreasing order; sequence contains concatenation of numbers read upward at a 45-degree angle.
A079809
Consider a triangle in which the 2n-th row contains first 2n positive integers in increasing order and the (2n+1)-st row contains first 2n+1 positive integers in decreasing order; sequence contains concatenation of numbers read upward at a 45-degree angle.
Terms
- a(0) =1a(1) =1a(2) =32a(3) =12a(4) =521a(5) =143a(6) =7234a(7) =1632a(8) =92541a(9) =18345a(10) =1127436a(11) =1103652a(12) =13294561a(13) =11238547a(14) =1521147638a(15) =1143105672a(16) =17213496581a(17) =11631258749
External references
- oeis: A079809