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A122541 Squares that can be seen on a digital clock. 0
0, 1, 4, 9, 16, 25, 36, 49, 100, 121, 144, 225, 256, 324, 400, 441, 529, 625, 729, 841, 900, 1024, 1156, 1225, 1444, 1521, 1600, 1849, 1936, 2025, 2116, 2209, 2304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

The smallest and the largest numbers seen on a digital clock are 0 and 2359 respectively. The number that comes immediately after 59 is 100, so that you never see 64, 81 or 169.

LINKS

Table of n, a(n) for n=1..33.

MATHEMATICA

Select[ Table[100hr + mnt, {hr, 0, 23}, {mnt, 0, 59}] // Flatten, IntegerQ@ Sqrt@# &] (* Robert G. Wilson v Sep 20 2006 *)

CROSSREFS

Sequence in context: A030152 A030288 A030154 * A133743 A235484 A028820

Adjacent sequences:  A122538 A122539 A122540 * A122542 A122543 A122544

KEYWORD

nonn,fini,full,base

AUTHOR

Hassan Taifour (hytaifour(AT)yahoo.co.uk), Sep 19 2006

STATUS

approved

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Last modified October 17 10:40 EDT 2018. Contains 316277 sequences. (Running on oeis4.)