OFFSET
0,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..200
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(4*k>3*h && 4*(k-1)<3*h, 0, M[1+h, k]))); M}
seq(n)={my(T=A(n)); vector(#T, k, sum(i=0, k-1, T[1+i, k-i]))} \\ Andrew Howroyd, Jan 19 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Definition corrected and edited by Georg Fischer, Jan 19 2020
STATUS
approved