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A053701 Vertically symmetric numbers. 11
0, 1, 8, 11, 25, 52, 88, 101, 111, 181, 205, 215, 285, 502, 512, 582, 808, 818, 888, 1001, 1111, 1251, 1521, 1881, 2005, 2115, 2255, 2525, 2885, 5002, 5112, 5252, 5522, 5882, 8008, 8118, 8258, 8528, 8888, 10001, 10101, 10801, 11011, 11111, 11811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Numbers that are symmetric about a vertical mirror.

2 and 5 are taken as mirror images (as on calculator displays)

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..2500

MAPLE

compdig := proc(n) if(n=2)then return 5: elif(n=5)then return 2: elif(n=0 or n=1 or n=8)then return n: else return -1: fi: end: isA053701 := proc(n) local d, l, j: d:=convert(n, base, 10): l:=nops(d): for j from 1 to ceil(l/2) do if(not d[j]=compdig(d[l-j+1]))then return false: fi: od: return true: end: for n from 0 to 10000 do if(isA053701(n))then printf("%d, ", n): fi: od: # Nathaniel Johnston, May 17 2011

CROSSREFS

Cf. A000787, A007284, A018846 (strobogrammatic numbers).

Sequence in context: A243520 A129730 A195160 * A029615 A051791 A243975

Adjacent sequences:  A053698 A053699 A053700 * A053702 A053703 A053704

KEYWORD

nonn,base

AUTHOR

Henry Bottomley, Feb 14 2000

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Oct 01 2001

STATUS

approved

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Last modified June 24 08:33 EDT 2017. Contains 288697 sequences.