N,K=map(int,input().split())
c=dict()
c[K]=1
ans=0
for i in range(1,N+1):
  c2=dict()
  for j in c:
    s=j//i
    if s==0:
      continue
    else:
      if s in c2:
        c2[s]+=c[j]
      else:
        c2[s]=c[j]
  for j in c2:
    if j in c:
      c[j]+=c2[j]
    else:
      c[j]=c2[j]
for i in c:
  ans+=c[i]
ans-=1
print(ans)