import sys

sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 63)
md = 10**9+7
# md = 998244353

N, K = LI()

if N == 1 or K == 1:
    print(1)
    exit()

dp = {}
stack = [(N, K)]
while stack:
    n, k = stack.pop()
    kn = k//n
    if n == 2:
        dp[n, k] = 2
        if k >= n: dp[n, k] += 2
    else:
        b1 = (n-1, k) not in dp
        b2 = kn > 1 and (n-1, kn) not in dp
        if b1 or b2:
            stack.append((n, k))
            if b1: stack.append((n-1, k))
            if b2: stack.append((n-1, kn))
        else:
            dp[n, k] = dp[n-1, k]
            if kn == 1:
                dp[n, k] += 2
            elif kn > 1:
                dp[n, k] += dp[n-1, kn]

print(dp[N, K]-1)