OFFSET
2,1
COMMENTS
See the Sun (2008) reference for the (complicated) precise definition.
It appears that every second row equals every second row of A034807. - Ralf Stephan, Oct 26 2013
LINKS
Zhi-Wei Sun, On sums of binomial coefficients and their applications, arXiv:math/0404385 [math.NT], 2004-2008.
Zhi-Wei Sun, On sums of binomial coefficients and their applications, Discrete Math. 308 (2008), no. 18, 4231--4245. MR2427754(2010d:05002).
EXAMPLE
Triangle begins:
2
5 4
4 2
7 13 4
6 9 2
9 26 25 4
8 20 16 2
11 43 70 41 4
10 35 50 25 2
13 64 147 155 61 4
12 54 112 105 36 2
...
PROG
(PARI)
c(m, i) = binomial(m+1-i, i)*(m*m+m-2*i)/((m-i)*(m+1-i));
d(m, i) = binomial(m-i, i)*m/(m-i);
b(m, i) = if ( m%2==0, d(m, i), c(m, i) );
for (m=2, 16, for (i=1, ceil(m/2), print1( b(m, i), ", " ))) \\ Hugo Pfoertner, Nov 01 2017
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
N. J. A. Sloane, Apr 05 2012
EXTENSIONS
Corrected and extended by Hugo Pfoertner, Nov 01 2017
STATUS
approved