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Search: id:A069325
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| A069325 |
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Number of 3 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. |
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+0
20
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| 1, 8, 51, 295, 1632, 8830, 47239, 251261, 1332456, 7055228, 37327007, 197404203, 1043751584, 5518106750, 29171471659, 154210451661, 815197197636, 4309313949364, 22779900825195, 120418887728947
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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G.f.: -x*(1-x+x^3)/(2*x^2+2*x-1)/(2*x^5-4*x^4+x^3+9*x^2-7*x+1). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Jul 02 2003
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CROSSREFS
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Cf. 2 X n A048739, 4 X n A069326, 5 X n A069327, 6 X n A069328, 7 X n A069329, 8 X n A069330, 9 X n A069331, 10 X n A069332, 11 X n A069333, 12 X n A069334, 13 X n A069335, 14 X n A069336, 15 X n A069337, 16 X n A069338, 17 X n A069339, 18 X n A069340, 19 X n A069341, 20 X n A069342, n X n A069343, n X n symmetric A069344.
Adjacent sequences: A069322 A069323 A069324 this_sequence A069326 A069327 A069328
Sequence in context: A000851 A054620 A034516 this_sequence A082135 A037697 A037606
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhh(AT)cadence.com), Mar 16 2002.
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