id:A122573 - OEIS Search Results

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4 X 4 vector matrix Markov for characteristic polynomial:(1 - 4 x^2 + x^4) Which Mathematica gives as a factor of the cubic polynomial: Factor[(1 - 14 x^4 + x^8)]=(1 - 4 x^2 + x^4)(1 + 4 x^2 + x^4) Also:a(n)=4*a(n-2)-a(n-4).

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1, 1, 1, 1, 3, 3, 11, 11, 41, 41, 153, 153, 571, 571, 2131, 2131, 7953, 7953, 29681, 29681, 110771, 110771, 413403, 413403, 1542841, 1542841, 5757961, 5757961, 21489003, 21489003, 80198051, 80198051, 299303201, 299303201, 1117014753 (list; graph; listen)

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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