A122541 Squares that can be seen on a digital clock.

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

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