A121610 - OEIS

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A121610

Composite numbers that can be written as concatenation of two composite numbers in decimal representation.

3

44, 46, 48, 49, 64, 66, 68, 69, 84, 86, 88, 94, 96, 98, 99, 104, 106, 108, 124, 126, 128, 129, 144, 146, 148, 154, 156, 158, 159, 164, 166, 168, 169, 184, 186, 188, 189, 204, 206, 208, 209, 214, 216, 218, 219, 224, 226, 228, 244, 246, 248, 249, 254, 256, 258

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

A002808(328) = 408 = 40*10+8 = A002808(27)*10+A002808(3),

therefore 408 is a term: a(99) = 408;

A002808(331) = 412 = 4*100+12 = A002808(1)*100+A002808(6),

therefore 412 is a term: a(100) = 412.

CROSSREFS

Cf. A121609, A105184, A121608.

Sequence in context: A364657 A254750 A225619 * A254752 A178755 A182261

Adjacent sequences: A121607 A121608 A121609 * A121611 A121612 A121613

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Aug 10 2006

STATUS

approved