A055954 n + reversal of base 7 digits of n (written in base 10).

0, 2, 4, 6, 8, 10, 12, 8, 16, 24, 32, 40, 48, 56, 16, 24, 32, 40, 48, 56, 64, 24, 32, 40, 48, 56, 64, 72, 32, 40, 48, 56, 64, 72, 80, 40, 48, 56, 64, 72, 80, 88, 48, 56, 64, 72, 80, 88, 96, 50, 100, 150, 200, 250, 300, 350, 64, 114, 164, 214, 264, 314, 364, 78, 128, 178