A013952 Start with 1, apply 1->12, 21->21, 22->21, 2->2 (for final 2); take limit; note positions of 2's.

2, 3, 6, 8, 9, 11, 14, 15, 18, 19, 22, 24, 25, 28, 30, 31, 33, 36, 38, 39, 41, 44, 45, 48, 49, 51, 54, 55, 58, 59, 62, 64, 65, 68, 69, 72, 73, 76, 78, 79, 82, 84, 85, 87, 90, 92, 93, 96, 98, 99, 102, 104, 105, 107, 110, 112, 113, 115, 118, 119

Offset

1,1

Links

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

Crossrefs

Cf. A013949.

Sequence in context: A013948 A187478 A269860 * A105042 A092114 A032711

Adjacent sequences: A013949 A013950 A013951 * A013953 A013954 A013955

Keyword

nonn

Author

Clark Kimberling

Extensions

Incorrect 88 removed by Sean A. Irvine, Sep 02 2018

Status

approved