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Search: id:A151442
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| A151442 |
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Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (0, -1), (0, 1), (1, -1), (1, 0)} |
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+0
1
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| 1, 1, 2, 5, 13, 37, 111, 348, 1115, 3690, 12437, 42646, 148530, 523835, 1868356, 6729649, 24454173, 89552497, 330263689, 1225741014, 4575462854, 17169395749, 64738926261, 245187658138, 932406910922, 3559219448897, 13634163069767, 52398809327631, 201994189232865, 780899820381385, 3027006453635929
(list; graph; listen)
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