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A078827
Number of primes contained as binary substrings in binary representation of n, counted with repetitions.
4
0, 0, 1, 1, 1, 2, 2, 3, 1, 1, 3, 4, 2, 4, 4, 5, 1, 2, 2, 3, 3, 4, 5, 7, 2, 2, 5, 6, 4, 7, 6, 8, 1, 1, 3, 3, 2, 4, 4, 5, 3, 4, 5, 7, 5, 7, 8, 10, 2, 3, 3, 4, 5, 7, 7, 9, 4, 4, 8, 10, 6, 10, 9, 11, 1, 1, 2, 3, 3, 4, 4, 6, 2, 3, 5, 6, 4, 6, 6, 8, 3, 4, 5, 7, 5, 6, 8, 10, 5, 6, 8, 9, 8, 11, 11, 13, 2, 3, 4, 4, 3
OFFSET
0,6
EXAMPLE
n=7 -> '111' contains 3 binary substrings which are primes: '11' (11b), '11' (b11) and '111' itself, therefore a(7)=2.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Dec 08 2002
STATUS
approved