OFFSET
0,5
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..1325
EXAMPLE
Array begins:
======================================
h\k | 0 1 2 3 4 5 6 7
----+---------------------------------
0 | 1 1 1 1 1 1 1 1 ...
1 | 1 2 1 2 3 4 5 6 ...
2 | 1 3 4 2 5 9 14 20 ...
3 | 1 4 8 10 15 24 38 58 ...
4 | 1 5 13 23 38 62 38 96 ...
5 | 1 6 19 42 80 142 180 96 ...
6 | 1 7 26 68 148 290 470 566 ...
7 | 1 8 34 102 250 540 1010 1576 ...
...
PROG
(PARI) A(h, k=h)={my(M=matrix(h+1, k+1, i, j, 1)); for(h=1, h, for(k=1, k, M[1+h, 1+k] = M[h, 1+k] + if(3*k>4*h && 3*(k-1)<4*h, 0, M[1+h, k]))); M}
{ my(T=A(10)); for(i=1, #T, print(T[i, ]))} \\ Andrew Howroyd, Jan 19 2020
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling. Definition revised Dec 08 2006
STATUS
approved