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File size: 286 Bytes
1514a0b | 1 2 3 4 5 6 7 8 | def bell_Number(n):
bell = [[0 for i in range(n + 1)] for j in range(n + 1)]
bell[0][0] = 1
for i in range(1, n + 1):
bell[i][0] = bell[i - 1][i - 1]
for j in range(1, i + 1):
bell[i][j] = bell[i - 1][j - 1] + bell[i][j - 1]
return bell[n][0] |