OFFSET
0,2
COMMENTS
Power sequence relate to the Pythagorean musical scale: v(n,m) = v[0] * (3 * 2^n * m) starting at m = 1: a(n) = 3 * 2^(n-1) * a(n-1).
Hankel transform of A089022 with interpolated zeros. - Paul Barry, Mar 17 2008
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..80
FORMULA
a(n) = 3^n * 2^binomial(n,2). - Paul Barry, Mar 17 2008
MATHEMATICA
a[n_]:= a[n]= If[n<2, 2^(n+1) -1, 3*2^(n-1)*a[n-1]]; Table[a[n], {n, 0, 20}]
PROG
(Sage) [3^n*2^binomial(n, 2) for n in (0..20)] # G. C. Greubel, Feb 14 2021
(Magma) [3^n*2^Binomial(n, 2): n in [0..20]]; // G. C. Greubel, Feb 14 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Nov 17 2007
EXTENSIONS
Offset changed by G. C. Greubel, Feb 14 2021
STATUS
approved