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A168456 a(n)=10*n-a(n-1)-4 (with a(1)=8) 0
8, 8, 18, 18, 28, 28, 38, 38, 48, 48, 58, 58, 68, 68, 78, 78, 88, 88, 98, 98, 108, 108, 118, 118, 128, 128, 138, 138, 148, 148, 158, 158, 168, 168, 178, 178, 188, 188, 198, 198, 208, 208, 218, 218, 228, 228, 238, 238, 248, 248, 258, 258, 268, 268, 278, 278, 288 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n)=10*n-a(n-1)-4 (with a(1)=8)

EXAMPLE

For n=2, a(2)=10*2-8-4=8; n=3, a(3)=10*3-8-4=18; n=4, a(4)=10*4-18-4=18

CROSSREFS

Sequence in context: A168409 A135405 A006784 * A061156 A195862 A205382

Adjacent sequences:  A168453 A168454 A168455 * A168457 A168458 A168459

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 26 2009

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Last modified February 13 22:36 EST 2012. Contains 205567 sequences.