A091678 In base 4, numbers n of the form k + reverse(k) for at least one k.

0, 2, 4, 5, 6, 10, 15, 17, 20, 25, 30, 33, 34, 41, 42, 50, 51, 58, 59, 65, 67, 68, 75, 76, 84, 85, 92, 93, 101, 102, 105, 109, 110, 118, 125, 126, 130, 145, 150, 165, 170, 185, 190, 195, 210, 215, 230, 235, 250, 255, 257, 260, 275, 280, 289, 295, 300, 315, 320, 321

Offset: 0

Author

Klaus Brockhaus, Jan 28 2004

Keywords

• base
• easy
• nonn

Comments

Base-4 analog of A067030. Complement of A091679.

Examples

			25 is a term since 25 (decimal) = 121 = 110 + 011 = 20 (decimal) + 5 (decimal).
		

Crossrefs

Cf. A035524, A091679, A067030.