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Upside down (OEIS A045573) (Posted on 2014-04-11) Difficulty: 3 of 5
Some numbers remain numbers when turned upside down (using digits 0125689, with no final 0's): 1, 2, 5, 6, 8, 9, 11, 12, etc

IF a1=1, a2=2, a3=5,... a8=12,, etc

a.Evaluate a100
b. Evaluate a1000
c. If an= 888, what is n?

See The Solution Submitted by Ady TZIDON    
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  Subject Author Date
re(2): Direct Basic solution......corrections...Steve Herman2014-04-12 11:41:15
Some Thoughtsre(2): Direct Basic solutionAdy TZIDON2014-04-12 11:29:07
re: Direct Basic solutionCharlie2014-04-12 09:35:09
Hints/Tipsre: Direct Basic solution......corrections...Ady TZIDON2014-04-12 09:27:56
Direct Basic solutionSteve Herman2014-04-11 21:06:06
Solutioncomputer solutionCharlie2014-04-11 15:47:31
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