A013951 Start with 1, apply 1->12, 21->21, 22->21, 2->2 (for final 2); take limit; note positions of 1's.

1, 4, 5, 7, 10, 12, 13, 16, 17, 20, 21, 23, 26, 27, 29, 32, 34, 35, 37, 40, 42, 43, 46, 47, 50, 52, 53, 56, 57, 60, 61, 63, 66, 67, 70, 71, 74, 75, 77, 80, 81, 83, 86, 88, 89, 91, 94, 95, 97, 100, 101, 103, 106, 108, 109, 111, 114, 116, 117, 120

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Crossrefs

Cf. A013949.

Sequence in context: A287658 A039577 A370861 * A269861 A187479 A013947

Adjacent sequences: A013948 A013949 A013950 * A013952 A013953 A013954

Keyword

nonn

Author

Clark Kimberling

Extensions

Missing 88 inserted by Sean A. Irvine, Sep 02 2018

Status

approved