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A090420 Numbers having a unique representation as concatenation of primes in binary. 2
2, 3, 5, 7, 13, 15, 17, 19, 21, 37, 41, 53, 55, 67, 73, 81, 89, 91, 97, 101, 103, 107, 111, 115, 123, 131, 137, 139, 141, 143, 149, 159, 163, 165, 169, 171, 177, 193, 197, 199, 211, 215, 219, 221, 227, 235, 243, 245, 257, 263, 269, 277, 281, 285, 293, 295, 301 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

A090418(a(n)) = 1; subsequence of A090421.

CROSSREFS

Cf. A004676, A007088.

Sequence in context: A065107 A185956 A168484 * A031344 A004682 A173105

Adjacent sequences:  A090417 A090418 A090419 * A090421 A090422 A090423

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 30 2003

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Last modified February 14 06:48 EST 2012. Contains 205577 sequences.