The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A291630 Numbers k such that 5 is the smallest decimal digit of k^2. 7
 24, 76, 87, 236, 314, 316, 766, 816, 834, 2366, 2383, 2387, 2424, 2563, 2626, 2976, 7613, 7666, 8117, 8184, 8234, 8286, 8366, 8716, 8814, 9266, 9316, 9363, 9474, 9786, 9837, 23634, 23784, 23866, 23874, 24474, 25663, 25684, 26076, 26187, 26374, 26417, 27687 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Chai Wah Wu, Table of n, a(n) for n = 1..10000 EXAMPLE 87 is in the sequence because 87^2 = 7569, the smallest decimal digit of which is 5. PROG (PARI) select(k->vecmin(digits(k^2))==5, vector(30000, k, k)) (Python) A291630_list = [k for k in range(1, 10**6) if min(str(k**2)) == '5'] # Chai Wah Wu, Aug 28 2017 CROSSREFS Cf. A291625, A291626, A291627, A291628, A291629, A291631. Sequence in context: A265424 A033572 A233883 * A195027 A325958 A211574 Adjacent sequences: A291627 A291628 A291629 * A291631 A291632 A291633 KEYWORD nonn,base AUTHOR Colin Barker, Aug 28 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 26 13:43 EST 2022. Contains 358362 sequences. (Running on oeis4.)