

A181303


Numbers of the form i*7^j1 (i=1..6, j >= 0).


8



0, 1, 2, 3, 4, 5, 6, 13, 20, 27, 34, 41, 48, 97, 146, 195, 244, 293, 342, 685, 1028, 1371, 1714, 2057, 2400, 4801, 7202, 9603, 12004, 14405, 16806, 33613, 50420, 67227, 84034, 100841, 117648, 235297, 352946, 470595, 588244, 705893, 823542, 1647085, 2470628, 3294171, 4117714, 4941257
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OFFSET

1,3


LINKS

Table of n, a(n) for n=1..48.
Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,7,7).


FORMULA

G.f.: x^2*(x+1)*(x^2x+1)*(x^2+x+1) / ((x1)*(7*x^61)).  Colin Barker, Feb 01 2013


MATHEMATICA

Sort[Flatten[Table[i 7^j1, {i, 1, 6}, {j, 0, 7}]]] (* Harvey P. Dale, Feb 03 2011 *)


CROSSREFS

Smallest number whose base b sum of digits is n: A000225 (b=2), A062318 (b=3), A180516 (b=4), A181287 (b=5), A181288 (b=6), this sequence (b=7), A165804 (b=8), A140576 (b=9), A051885 (b=10).  Jason Kimberley, Nov 02 2011
Sequence in context: A153695 A300857 A255261 * A276529 A200330 A121433
Adjacent sequences: A181300 A181301 A181302 * A181304 A181305 A181306


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane, Jan 25 2011


STATUS

approved



