A261168 List run lengths of digits different from '8', when all terms are concatenated. Lexicographically first such sequence of nonnegative numbers with no repeated terms.

1, 8, 0, 2, 3, 4, 5, 6, 7, 9, 88, 10, 80, 11, 81, 12, 18, 13, 14, 28, 15, 16, 17, 82, 19, 20, 21, 83, 22, 23, 24, 25, 84, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 59, 60, 61, 62, 63, 64, 65, 66, 67, 69, 70, 71, 72, 73, 38, 74, 75, 76, 77

Offset

1,2

Comments

See A261161-A261163 for comments and examples.

Links

Table of n, a(n) for n=1..81.

E. Angelini, To reach the next "1", SeqFan list, August 10, 2015.

Prog

(PARI) A261168(n=99, d=8, a=1, p=0, u=[-1], r=u)={for(n=2, n, print1(a", "); p+=#digits(a)+!a; r=concat(r, r[#r]+a+1); while(#r>1&&r[1]<p, r=r[2..-1]); u=setunion(u, [a]); while(#u>1&&u[2]==u[1]+1, u=u[2..-1]); for(k=u[1]+1, 9e9, setsearch(u, k)&&next; if(r[1] >= p+#dk=if(k, digits(k), [0]), setsearch(Set(dk), d)&&next, for(i=1, #dk, (dk[i]==d)==!setsearch(r, p+i-1)&&next(2))); a=k; next(2)); error); a}

Crossrefs

Cf. A261160 - A261167, A261169.

Sequence in context: A011104 A232227 A322231 * A329086 A342200 A265294

Adjacent sequences: A261165 A261166 A261167 * A261169 A261170 A261171

Keyword

nonn,base,changed

Author

Eric Angelini and M. F. Hasler, Aug 10 2015

Status

approved