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A081989 Product of digits + 1 is a square. 1
3, 8, 13, 18, 24, 31, 35, 38, 42, 46, 53, 57, 64, 68, 75, 79, 81, 83, 86, 97, 113, 118, 124, 131, 135, 138, 142, 146, 153, 157, 164, 168, 175, 179, 181, 183, 186, 197, 214, 222, 226, 234, 238, 241, 243, 246, 258, 262, 264, 283, 285 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Sequence is infinite.

LINKS

Table of n, a(n) for n=0..50.

EXAMPLE

135 belongs to this sequence as 1*3*5 + 1 = 16 is a square.

CROSSREFS

Cf. A081990.

Sequence in context: A105502 A105702 A184739 * A264780 A208276 A242487

Adjacent sequences:  A081986 A081987 A081988 * A081990 A081991 A081992

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Apr 04 2003

EXTENSIONS

Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003

STATUS

approved

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Last modified August 9 20:09 EDT 2020. Contains 336326 sequences. (Running on oeis4.)