OFFSET
0,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 0..1000
D. R. L. Brown, Bounds on surmising remixed keys, IACR, Report 2015/375, 2015-2016. See Table 1.
FORMULA
G.f.: 3*x*(1+2*x-x^2)/(1-x)^4. - Colin Barker, Apr 19 2012
E.g.f.: (x^3 + 6*x^2 + 3*x)*exp(x). - G. C. Greubel, Jul 20 2017
a(n) = A084990(n)/3. - Alois P. Heinz, Jul 21 2017
MAPLE
seq(sum(3*n+n^2-1, k=1..n), n=0..39); # Zerinvary Lajos, Jan 28 2008
MATHEMATICA
Table[n*(n^2 + 3n -1), {n, 0, 50}] (* G. C. Greubel, Jul 20 2017 *)
PROG
(PARI) { for (n=0, 1000, write("b064043.txt", n, " ", n*(n^2 + 3*n - 1)) ) } \\ Harry J. Smith, Sep 06 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Henry Bottomley, Aug 23 2001
STATUS
approved