A026350 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m)+m-1, else a(n) = least positive integer that has not yet occurred.

1, 2, 2, 3, 4, 3, 5, 4, 6, 7, 5, 8, 9, 6, 10, 7, 11, 12, 8, 13, 9, 14, 15, 10, 16, 17, 11, 18, 12, 19, 20, 13, 21, 22, 14, 23, 15, 24, 25, 16, 26, 17, 27, 28, 18, 29, 30, 19, 31, 20, 32, 33, 21, 34, 22, 35, 36, 23, 37, 38, 24, 39, 25, 40, 41, 26

Offset

1,2

Links

Table of n, a(n) for n=1..66.

Formula

a(n+1)=A026242(n)+1, for all n>0. - M. F. Hasler, Sep 17 2014

Prog

(PARI) A026350=vector(#A026242+1, n, if(n>1, A026242[n-1])+1) \\ Assumes the vector A026242 is defined, cf. there for PARI code. - M. F. Hasler, Sep 17 2014

Crossrefs

Cf. A026272.

Sequence in context: A026254 A091525 A091524 * A205002 A370929 A355029

Adjacent sequences: A026347 A026348 A026349 * A026351 A026352 A026353

Keyword

nonn

Author

Clark Kimberling

Status

approved