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 A098783 Smallest integer not occurring earlier such that the concatenation of the integers has the property that the first two digits sum to 9, the next two digits also, etc. 1
 0, 9, 1, 8, 2, 7, 3, 6, 4, 5, 18, 27, 36, 45, 54, 63, 72, 81, 90, 180, 91, 80, 92, 70, 93, 60, 94, 50, 95, 40, 96, 30, 97, 20, 98, 10, 909, 181, 82, 71, 83, 61, 84, 51, 85, 41, 86, 31, 87, 21, 88, 11, 809, 182, 73, 62, 74, 52, 75, 42, 76, 32, 77, 22, 78, 12, 709, 183, 64, 53, 65 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS This sequence contains no beastly numbers (A051003). - Rémy Sigrist, Dec 31 2017 LINKS Rémy Sigrist, Table of n, a(n) for n = 0..10000 Rémy Sigrist, PARI program for A098783 EXAMPLE When parenthesis are added one can see the successive pairs of digits with sum 9: (0, 9), (1, 8), (2, 7), (3, 6), (4, 5), (18), (27), (36), (45), (54), (63), (72), (81), (90), (18)(0, 9)(1, ... - Eric Angelini, Dec 18 2017 CROSSREFS Cf. A051003. Sequence in context: A065444 A010169 A113657 * A234468 A011111 A301815 Adjacent sequences:  A098780 A098781 A098782 * A098784 A098785 A098786 KEYWORD base,easy,nonn AUTHOR Eric Angelini, Oct 04 2004 STATUS approved

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Last modified December 1 11:38 EST 2021. Contains 349429 sequences. (Running on oeis4.)