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A037535 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,1,2. 0
1, 11, 112, 1121, 11211, 112112, 1121121, 11211211, 112112112, 1121121121, 11211211211, 112112112112, 1121121121121, 11211211211211, 112112112112112, 1121121121121121 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

a(n)=10*a(n-1)+(1/9)*{(n mod 3)+4*[(n+1) mod 3]+7*[(n+2) mod 3]}, with a(0)=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Jul 30 2009]

CROSSREFS

Sequence in context: A058949 A119742 A075842 * A065834 A104720 A132926

Adjacent sequences:  A037532 A037533 A037534 * A037536 A037537 A037538

KEYWORD

nonn,base

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 16 15:54 EST 2012. Contains 205932 sequences.