[1]

[1, 1]

[1, 2, 1]

[1, 3, 3, 1]

[1, 4, 6, 4, 1]

[1, 5, 10, 10, 5, 1]

[1, 6, 15, 20, 15, 6, 1]

[1, 7, 21, 35, 35, 21, 7, 1]

[1, 8, 28, 56, 70, 56, 28, 8, 1]

[1, 9, 36, 84, 126, 126, 84, 36, 9, 1]

[1, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1]

[1, 11, 55, 165, 330, 462, 462, 330, 165, 55, 11, 1]

[1, 12, 66, 220, 495, 792, 924, 792, 495, 220, 66, 12, 1]

[1, 13, 78, 286, 715, 1287, 1716, 1716, 1287, 715, 286, 78, 13, 1]

[1, 14, 91, 364, 1001, 2002, 3003, 3432, 3003, 2002, 1001, 364, 91, 14, 1]

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[1, 16, 120, 560, 1820, 4368, 8008, 11440, 12870, 11440, 8008, 4368, 1820, 560, 120, 16, 1]

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[1, 18, 153, 816, 3060, 8568, 18564, 31824, 43758, 48620, 43758, 31824, 18564, 8568, 3060, 816, 153, 18, 1]

[1, 19, 171, 969, 3876, 11628, 27132, 50388, 75582, 92378, 92378, 75582, 50388, 27132, 11628, 3876, 969, 171, 19, 1]

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