A228709 Numbers having in decimal representation at least one pair of consecutive digits with the same parity.

11, 13, 15, 17, 19, 20, 22, 24, 26, 28, 31, 33, 35, 37, 39, 40, 42, 44, 46, 48, 51, 53, 55, 57, 59, 60, 62, 64, 66, 68, 71, 73, 75, 77, 79, 80, 82, 84, 86, 88, 91, 93, 95, 97, 99, 100, 102, 104, 106, 108, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120

Offset: 1

Author

Reinhard Zumkeller, Aug 31 2013

Keywords

• nonn
• base

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A030141 (complement), A228710, A228722, A228723.

Cf. subsequences: A059708, A010785 (apart from first 10 terms).

Programs

Haskell

a228709 n = a228709_list !! (n-1)
a228709_list = filter ((== 0) . a228710) [0..]

Formula

A228710(a(n)) = 0.