OFFSET
1,1
LINKS
R. T. Eakin, A combinatorial partition of Mersenne numbers arising from spectroscopy, Journal of Number Theory, Volume 132, Issue 10, October 2012, Pages 2166-2183.
EXAMPLE
Triangle begins
2,
6, 12,
24, 36, 80,
100, 150, 240, 560,
420, 660, 1020, 1680, 4032,
1764, 2940, 4620, 7224, 12096, 29568,
...
PROG
(PARI) T(n, r) = binomial(2*n-2*r, n-r)*((n+1)/r)*sum(k=0, (r-1)\2, (-1)^k*binomial(2*r, k)*binomial(n+3*r-2*k, r-2*k-1));
tabl(nn) = for (n=1, nn, for (k=1, n, print1(T(n, k), ", ")); );
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Michel Marcus, Mar 01 2019
STATUS
approved