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 A167521 Positive integers not occurring in A167520. 0
 11, 29, 47, 67, 85, 105, 123, 143, 161, 181, 182, 184, 187, 190, 193, 196, 199, 202, 205, 209, 239, 266, 296, 323, 353, 380, 410, 445, 446, 448, 451, 454, 457, 460, 463, 467, 497, 527, 554, 584, 614, 641, 671, 701, 727, 728, 730, 733, 736, 739, 742, 745, 748 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Equivalently, positions of zero digits in A167520 (when all terms are concatenated). The first differences are (18, 18, 20, 18, 20, 18, 20, 18, 20, 1, 2, 3, 3, 3, 3, 3, 3, 3, 4, 30, 27, 30, 27, 30, 27, 30, 35, 1, 2, 3, 3, 3, 3, 3, 4, ...) LINKS EXAMPLE The first occurrence of the digit '0' in A167520 is as the least significant digit of A167520(10)=10, which occurs at position 11, thus a(1)=11. Equivalently, this is the least positive integer missing in A167520. The next occurrence of the digit '0' in A167520 is at position 29 (and 29 is the second positive integer not occurring in A167520), thus a(2)=29. PROG (PARI) base(n, b=10) = { my( a=[ n%b ]); while( 0=n & for(i=a[n-1]+1, #b, b[i] & (a=concat(a, i)) & break); #a

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Last modified June 22 05:44 EDT 2021. Contains 345367 sequences. (Running on oeis4.)