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A152276
Number of 4's among the digits of all n-digit primes.
9
0, 3, 31, 326, 3412, 35234, 358468, 3625027, 36582450, 368381208, 3704525518, 37218251329, 373639701352, 3748854986738
OFFSET
1,2
KEYWORD
base,nonn
AUTHOR
Jon E. Schoenfield, Dec 01 2008
EXTENSIONS
a(12)-a(14) from Giovanni Resta, Jul 20 2015
STATUS
approved