A094800 First term of a run of exactly two consecutive numbers such that for each m in the run, exactly m 1's are used in writing out all numbers 1 through m.

0, 200000, 2600000, 35000000, 35200000, 500000000, 500200000, 502600000, 535000000, 535200000

Offset

1,2

Comments

Numbers n such that n and n+1 are members of A014778, but n-1 and n+2 are not. - David Wasserman

References

M. Protat, Des Olympiades a l'Agregation, Nombre de "1", Problem 89, pp. 182-183, Ellipses, Paris 1997.

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. A014778.

Cf. A094798, A094799, A094801.

Sequence in context: A164321 A230019 A106777 * A200863 A345637 A346350

Adjacent sequences: A094797 A094798 A094799 * A094801 A094802 A094803

Keyword

base,easy,fini,full,nonn

Author

Lekraj Beedassy, Jun 11 2004

Extensions

Corrected by David Wasserman, Jun 29 2007. There are no further terms.

Status

approved