[Math] What comes next in the series

puzzlesequences-and-series

Well, here is a numerical sequence puzzle, which I really tried hard, but still could not find the pattern?
2
4
6
30
32
34
36
40
42
44
46
50
52
54
56
60
62
64
66
x?

Can anybody help me out in finding the pattern in these numbers?

Best Answer

This is the integer sequences A006933, describing Sloane's Eban numbers, $2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, 50, 52, 54, 56, 60, 62, 64, 66, 2000, 2002, 2004, 2006$, $2030, 2032, 2034, 2036, 2040, 2042, 2044, 2046, 2050, 2052, 2054, 2056, 2060, 2062, 2064$, $2066, 4000, 4002, 4004, 4006, 4030, 4032, 4034, 4036, 4040, 4042, 4044, 4046, 4050, ...$

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