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A270671 Every even-ranked term is bigger than the two terms that surround it AND every even-ranked digit is bigger than the two digits that surround it. This is the lexicographically first such infinite sequence. 0
1, 3, 2, 5, 4, 7, 6, 9, 8, 90, 10, 21, 20, 31, 30, 40, 32, 42, 41, 50, 43, 52, 51, 54, 53, 61, 60, 63, 62, 65, 64, 71, 70, 73, 72, 75, 74, 80, 76, 82, 81, 84, 83, 86, 85, 91, 87, 93, 92, 95, 94, 97, 96, 702, 12, 14, 13, 16, 15, 18, 17, 23, 19, 25, 24, 27, 26, 29, 28, 35, 34, 37, 36, 39, 38, 46, 45, 48, 47, 56, 49, 58, 57, 67, 59, 69, 68, 79, 78, 120, 98, 902, 121, 202, 130, 203, 131, 204, 132, 302, 140, 205, 141, 206, 142, 303 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..106.

EXAMPLE

Terms: 3 is bigger than 1 and 2; 5 is bigger than 2 and 4; 7 is bigger than 4 and 6; 9 is bigger than 6 and 8; 90 is bigger than 8 and 10; 21 is bigger than 10 and 20; etc.

Digits: 3 is bigger than 1 and 2; 5 is bigger than 2 and 4; 7 is bigger than 4 and 6; 9 is bigger than 6 and 8; 9 is bigger than 8 and 0; 1 is bigger than 0 and 0; etc.

CROSSREFS

Sequence in context: A065190 A152208 A282650 * A282664 A085230 A093715

Adjacent sequences:  A270668 A270669 A270670 * A270672 A270673 A270674

KEYWORD

nonn,base

AUTHOR

Eric Angelini and Jean-Marc Falcoz, Mar 21 2016

STATUS

approved

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Last modified March 21 22:19 EDT 2019. Contains 321382 sequences. (Running on oeis4.)