A062285 Numbers with the most significant digit even and alternating parity of digits.

0, 2, 4, 6, 8, 21, 23, 25, 27, 29, 41, 43, 45, 47, 49, 61, 63, 65, 67, 69, 81, 83, 85, 87, 89, 210, 212, 214, 216, 218, 230, 232, 234, 236, 238, 250, 252, 254, 256, 258, 270, 272, 274, 276, 278, 290, 292, 294, 296, 298, 410, 412, 414, 416, 418, 430, 432, 434, 436

Offset: 1

Author

Amarnath Murthy, Jun 18 2001

Keywords

• nonn
• base
• easy

Examples

			4325 is a member as the most significant digit is 4 (even) and the subsequent digits 3, 2, 5 are alternately odd and even.
		

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
• Index entries for 10-automatic sequences.

Crossrefs

Cf. A030142, A030143.

Programs

Haskell

a062285 n = a062285_list !! (n-1)
a062285_list = filter (even . a000030) a030141_list
-- Reinhard Zumkeller, Aug 31 2013

Formula

(1 - A000030(a(n)) mod 2) * A228710(a(n)) = 1. - Reinhard Zumkeller, Aug 31 2013

Extensions

Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jun 19 2001

Offset corrected by and a(1)=0 prepended by Reinhard Zumkeller, Aug 31 2013