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A037778 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,1,0,2. 0
3, 31, 310, 3102, 31023, 310231, 3102310, 31023102, 310231023, 3102310231, 31023102310, 310231023102, 3102310231023, 31023102310231, 310231023102310, 3102310231023102 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

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

CROSSREFS

Sequence in context: A112425 A144579 A069589 * A037666 A065837 A100894

Adjacent sequences:  A037775 A037776 A037777 * A037779 A037780 A037781

KEYWORD

nonn,base

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 15 18:47 EST 2012. Contains 205837 sequences.