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A074464
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Average digit (rounded down) in the decimal expansion of a prime number p, where 2^p-1 is a Mersenne prime.
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1
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2, 3, 5, 7, 2, 4, 5, 2, 3, 8, 2, 3, 2, 4, 4, 1, 3, 3, 3, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| prime numbers for Mersenne: 2,3,5,7,13,17,19,31,61 so the average digits rounded down are; 2, 3, 5, 7, (1+3)/2=2, (1+7)/2=4, (1+9)/2=5, (3+1)/2=2,floor((6+1)/2)=3...
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CROSSREFS
| Cf. A000043, A074463..
Sequence in context: A104212 A139751 A076779 * A074463 A038194 A111309
Adjacent sequences: A074461 A074462 A074463 * A074465 A074466 A074467
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KEYWORD
| easy,nonn,base
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AUTHOR
| Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 23 2002
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