A232488 a(1) = 7; a(n+1) = a(n) + product of nonzero digits of a(n).

7, 14, 18, 26, 38, 62, 74, 102, 104, 108, 116, 122, 126, 138, 162, 174, 202, 206, 218, 234, 258, 338, 410, 414, 430, 442, 474, 586, 826, 922, 958, 1318, 1342, 1366, 1474, 1586, 1826, 1922, 1958, 2318, 2366, 2582, 2742, 2854, 3174, 3258, 3498, 4362, 4506, 4626, 4914

Offset

1,1

Links

Table of n, a(n) for n=1..51.

P. A. Loomis, An Introduction to Digit Product Sequences, J. Rec. Math., 32 (2003-2004), 147-151.

P. A. Loomis, An Introduction to Digit Product Sequences, J. Rec. Math., 32 (2003-2004), 147-151. [Annotated archived copy]

Index entries for Colombian or self numbers and related sequences

Maple

See A232486.

Mathematica

nxt[n_]:=n+Times@@Select[IntegerDigits[n], #!=0&]; NestList[nxt, 7, 50] (* Harvey P. Dale, Jun 13 2015 *)

Crossrefs

Cf. A063108, A232486, A232488.

Sequence in context: A131439 A213604 A102041 * A351063 A070792 A178893

Adjacent sequences: A232485 A232486 A232487 * A232489 A232490 A232491

Keyword

nonn,base

Author

N. J. A. Sloane, Nov 29 2013

Status

approved