A261165 List run lengths of digits different from '5', when all terms are concatenated. Lexicographically first such sequence of nonnegative numbers with no repeated terms.

1, 5, 0, 2, 3, 4, 6, 55, 7, 8, 50, 9, 15, 10, 11, 51, 12, 13, 25, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 35, 44, 46, 47, 45, 48, 49, 60, 61, 52, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 73, 74, 76, 77, 78, 79, 80, 81, 82, 83, 84, 86, 87, 88, 65

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) A261165(n=99, d=5, 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 - A261164, A261166 - A261169.

Sequence in context: A366412 A172035 A019625 * A222597 A021999 A021203

Adjacent sequences: A261162 A261163 A261164 * A261166 A261167 A261168

Keyword

nonn,base

Author

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

Status

approved