OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (49,-624,576).
FORMULA
a(n) = a(n-1) + n * 24^(n-1).
a(n)= 49*a(n-1) - 624*a(n-2) + 576*a(n-3).
G.f.: x/( (1-x)*(1-24*x)^2 ). [Joerg Arndt, May 23 2010]
MATHEMATICA
a[1] = 1; a[n_Integer] := a[n - 1] + n*24^(n - 1); Table[ a[n], {n, 1, 20}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from Robert G. Wilson v, Sep 15 2000
Exchanged Lava formula of Jan 2009 with the definition [R. J. Mathar, May 23 2010]
STATUS
approved