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A014929
a(1)=1, a(n) = n*14^(n-1) + a(n-1).
2
1, 29, 617, 11593, 203673, 3430617, 56137369, 899445401, 14181546905, 220792014745, 3402593219481, 51997375255449, 789018236134297, 11901025061692313, 178581127445062553, 2667670656370058137, 39692877399129367449, 588537118527090893721, 8699235348529189004185
OFFSET
1,2
FORMULA
a(n) = (1+(13n-1)*14^n)/169. O.g.f.: x/((14*x-1)^2*(1-x)). - R. J. Mathar, Mar 05 2008
MAPLE
A014929 := proc(n) (1+(13*n-1)*14^n)/169 ; end: seq(A014929(n), n=1..10) ; # R. J. Mathar, Mar 05 2008
MATHEMATICA
Table[(1+(13n-1)*14^n)/169, {n, 20}] (* Wesley Ivan Hurt, Feb 26 2014 *)
PROG
(Magma) [(1+(13*n-1)*14^n)/169: n in [1..20]]; // Vincenzo Librandi, Mar 04 2014
(PARI) a(n) = (1+(13*n-1)*14^n)/169; \\ Jinyuan Wang, Mar 11 2020
CROSSREFS
Sequence in context: A142521 A032630 A361930 * A006136 A199038 A182329
KEYWORD
nonn,easy
EXTENSIONS
More terms from Vincenzo Librandi, Mar 04 2014
STATUS
approved