A054264 Concatenation of composite numbers between successive primes.

4, 6, 8910, 12, 141516, 18, 202122, 2425262728, 30, 3233343536, 383940, 42, 444546, 4849505152, 5455565758, 60, 6263646566, 686970, 72, 7475767778, 808182, 8485868788, 90919293949596, 9899100, 102, 104105106, 108, 110111112

Offset

0,1

Links

Table of n, a(n) for n=0..27.

Mathematica

FromDigits[Flatten[IntegerDigits/@(Range[#[[1]]+1, #[[2]]-1])]]&/@Partition[ Prime[Range[2, 30]], 2, 1] (* Harvey P. Dale, Mar 04 2014 *)

Crossrefs

Cf. A046933, A054265, A054266, A054267, A054268.

Sequence in context: A323214 A061214 A137024 * A077305 A146294 A133982

Adjacent sequences: A054261 A054262 A054263 * A054265 A054266 A054267

Keyword

nonn,base,easy

Author

Patrick De Geest, Apr 15 2000

Status

approved