A177982 a(n) = composite number > a(n-1) that contains the n-th composite as a substring.

14, 16, 18, 39, 100, 112, 114, 115, 116, 118, 120, 121, 122, 124, 125, 126, 270, 280, 300, 320, 330, 334, 335, 336, 338, 339, 340, 342, 344, 345, 346, 348, 490, 500, 510, 520, 540, 550, 556, 570, 580, 600, 620, 630, 640, 650, 660, 668, 669, 670, 672, 674

Offset

1,1

Comments

a(n) <= 10*n.

Links

Table of n, a(n) for n=1..52.

Example

.. comp(n): _4 _6 _8 _9 _10 _12 _14 _15 _16 _18 _20 _21
..... a(n): 14 16 18 39 100 112 114 115 116 118 120 121 .

Crossrefs

Cf. A169798, A144565, A177981.

Sequence in context: A158282 A053425 A178071 * A034305 A091898 A061365

Adjacent sequences: A177979 A177980 A177981 * A177983 A177984 A177985

Keyword

base,nonn

Author

Reinhard Zumkeller, May 16 2010

Status

approved