A039411 Numbers whose base-10 representation has the same nonzero number of 2's and 4's.
24, 42, 124, 142, 204, 214, 234, 240, 241, 243, 245, 246, 247, 248, 249, 254, 264, 274, 284, 294, 324, 342, 402, 412, 420, 421, 423, 425, 426, 427, 428, 429, 432, 452, 462, 472, 482, 492, 524, 542, 624, 642, 724, 742, 824, 842, 924, 942, 1024, 1042
Offset: 1