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 A340256 Lexicographically earliest sequence of distinct nonnegative terms such that for any n >= 0, a(n+1) is obtained by altering the leftmost digit (which is not a leading zero) in the primorial base representation of a(n) or if this is not possible by altering the rightmost leading zero in the primorial base representation of a(n). 2
 0, 1, 3, 5, 4, 2, 8, 14, 20, 26, 24, 6, 12, 18, 22, 10, 16, 28, 29, 11, 17, 23, 19, 7, 13, 25, 27, 9, 15, 21, 51, 81, 111, 141, 171, 201, 183, 33, 63, 93, 123, 153, 159, 39, 69, 99, 129, 189, 195, 45, 75, 105, 135, 165, 177, 57, 87, 117, 147, 207, 205, 55, 85 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS This sequence appears to be a permutation of the nonnegative integers. LINKS Rémy Sigrist, Table of n, a(n) for n = 0..2309 Rémy Sigrist, PARI program for A340256 Index entries for sequences related to primorial base EXAMPLE The first terms, alongside their representation in primorial base, are: n a(n) prim(a(n)) ---- ---- ---------- 0 0 0 1 1 1 2 3 11 3 5 21 4 4 20 5 2 10 6 8 110 7 14 210 8 20 310 9 26 410 10 24 400 11 6 100 12 12 200 13 18 300 14 22 320 15 10 120 16 16 220 PROG (PARI) See Links section. CROSSREFS See A340250 for similar sequences. Sequence in context: A196771 A266121 A340255 * A354247 A349943 A243296 Adjacent sequences: A340253 A340254 A340255 * A340257 A340258 A340259 KEYWORD nonn,base AUTHOR Rémy Sigrist, Jan 02 2021 STATUS approved

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Last modified July 12 21:16 EDT 2024. Contains 374257 sequences. (Running on oeis4.)