A050627 - OEIS

A050627

Product of digits of n is a nonzero single-digit square.

1, 4, 9, 11, 14, 19, 22, 33, 41, 91, 111, 114, 119, 122, 133, 141, 191, 212, 221, 313, 331, 411, 911, 1111, 1114, 1119, 1122, 1133, 1141, 1191, 1212, 1221, 1313, 1331, 1411, 1911, 2112, 2121, 2211, 3113, 3131, 3311, 4111, 9111, 11111, 11114, 11119

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OFFSET

1,2

COMMENTS

I.e., the product of digits is 1, 4, or 9. - Franklin T. Adams-Watters, Sep 27 2016

LINKS

Table of n, a(n) for n=1..47.

MATHEMATICA

Select[Range[12000], MemberQ[{1, 4, 9}, Times@@IntegerDigits[#]]&] (* Harvey P. Dale, Jan 22 2016 *)

CROSSREFS

Cf. A007954, A028845, A028839, A002275 (a subsequence).

Sequence in context: A199595 A028845 A050626 * A036435 A162188 A243178

Adjacent sequences: A050624 A050625 A050626 * A050628 A050629 A050630

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jun 15 1999

STATUS

approved