A226179 Fixed points of A218468 (= least unused number which is a multiple of a digit of the preceding term).

1, 2, 10, 19, 20, 34, 51, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187

Offset

1,2

Comments

Indices k for which A218468(k)=k, where A218468(k) is the least unused number to be a multiple of one digit of the preceding term of that sequence.

Hans Havermann first stated that 2*10^k is such a fixed point, for all k >= 0. More subsequences have been given by Lars Blomberg, see link.

Links

Table of n, a(n) for n=1..68.

Hans Havermann, Table of a218468(n) = n

L. Blomberg, H. Havermann et al., in reply to E. Angelini's OP, Re: a(n+1) is the multiple of at least one digit of a(n), SeqFan list, May 29 2013.

Crossrefs

Cf. A218468.

Sequence in context: A156446 A032685 A085936 * A030570 A039560 A299577

Adjacent sequences: A226176 A226177 A226178 * A226180 A226181 A226182

Keyword

nonn,base

Author

M. F. Hasler, May 30 2013

Status

approved