A037516 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,1.

2, 14, 99, 695, 4865, 34056, 238394, 1668758, 11681307, 81769151, 572384057, 4006688400, 28046818802, 196327731614, 1374294121299, 9620058849095, 67340411943665, 471382883605656, 3299680185239594

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Index entries for linear recurrences with constant coefficients, signature (7,0,1,-7).

Formula

G.f.: x*(2+x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011

Crossrefs

Sequence in context: A109808 A304444 A247481 * A037719 A158811 A198280

Adjacent sequences: A037513 A037514 A037515 * A037517 A037518 A037519

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved