[seqfan] Even numbers split into two sequences

[Eric Angelini]

Hello SeqFans,
C is only made of single even numbers
D too -- but none is present in C

D(n) is the absolute first difference |C(n) - C(n+1)|

Always extend C with the smallest unused even number so far
not leading to a contradiction:

C = 2, 6, 14, 24, 40, 12, 30, 50, 72, 26, 58, 92, 36, 74, ...
D =   4  8  10  16  28  18  20  22  46  32  34  56  38

Best,
É.