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A037548
Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2.
0
1, 9, 65, 456, 3194, 22360, 156521, 1095649, 7669545, 53686816, 375807714, 2630654000, 18414578001, 128902046009, 902314322065, 6316200254456, 44213401781194, 309493812468360, 2166456687278521
OFFSET
1,2
FORMULA
G.f.: x*(1+2*x+2*x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015
CROSSREFS
Sequence in context: A081040 A102902 A127534 * A238275 A287816 A036731
KEYWORD
nonn,base,easy
STATUS
approved