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Search: id:A151423
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| A151423 |
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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 2 n steps taken from {(-1, -1), (-1, 0), (-1, 1), (1, -1), (1, 1)} |
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| 1, 3, 28, 355, 5264, 85764, 1488432, 27030861, 507976040, 9804514720, 193339562208, 3880220133244, 79026982569976, 1629698960355600, 33969388149210240, 714666181953790035, 15158444163422689080, 323839596100845917400, 6962822068346268247200, 150567286583848676406480
(list; graph; listen)
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