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 A347024 There are a(n) digits between a(n) and the next copy of the string a(n) read backwards. This is the lexicographically earliest sequence of distinct positive terms with this property. 0
 1, 2, 10, 20, 3, 4, 7, 8, 30, 400, 17, 5, 80, 9, 6, 15, 100, 26, 19, 11, 27, 16, 18, 51, 40, 31, 12, 21, 29, 13, 61, 62, 81, 210, 72, 22, 310, 41, 23, 28, 71, 34, 49, 200, 46, 33, 220, 91, 50, 53, 24, 60, 83, 820, 35, 25, 37, 143, 116, 32, 633, 42, 1000, 194, 64, 45, 270, 218, 65, 305, 117, 352, 36, 14 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..74. EXAMPLE a(1) = 1; there is 1 digit between a(1) and the "1" of 10: this is the digit 2; a(2) = 2; there are 2 digits between a(2) and the "2" of 20: they are 1 and 0; a(3) = 10; there are 10 digits between a(3) and the next string "01" (formed by the terms "400, 17"): they are 2, 0, 3, 4, 7, 8, 3, 0, 4 and 0; a(4) = 20; there are 20 digits between a(4) and the next string "02" (formed by the terms "100, 26"): they are 3, 4, 7, 8, 3, 0, 4, 0, 0, 1, 7, 5, 8, 0, 9, 6, 1, 5, 1 and 0; a(5) = 3; there are 3 digits between a(5) and the "3" of 30: they are 4, 7 and 8; a(6) = 4; there are 4 digits between a(6) and the "4" of 400: they are 7, 8, 3 and 0; a(7) = 7; there are 7 digits between a(7) and the "7" of 17: they are 8, 3, 0, 4, 0, 0 and 1; etc. CROSSREFS Cf. A346810, A303151. Sequence in context: A342543 A342539 A346810 * A009342 A357486 A350508 Adjacent sequences: A347021 A347022 A347023 * A347025 A347026 A347027 KEYWORD base,nonn AUTHOR Eric Angelini and Carole Dubois, Aug 11 2021 STATUS approved

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Last modified September 21 17:55 EDT 2023. Contains 365503 sequences. (Running on oeis4.)