

A078279


a(n) is the number from which if oddpositioned digits are deleted then one gets the concatenation of first n composite numbers, while if evenpositioned digits are deleted then one gets reverse concatenation of first n composite numbers. Position of least significant digit is considered to be 1.


3



44, 4664, 486684, 49688694, 416089981604, 4162819019081624, 41648192110019281644, 416581941102112019481654, 4166819511041122114019581664, 41688196110511241142115019681684
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