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 A006135 T(n+2,2) from table A045912 of characteristic polynomial of negative Pascal matrix. (Formerly M4650) 4
 1, 9, 72, 626, 6084, 64974, 744193, 8965323, 112088583, 1441465015, 18952951005, 253712542005, 3447133563343, 47425573790397, 659506609478472, 9256644358552742, 130981854694547790, 1866712391002772586 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Robert Israel, Table of n, a(n) for n = 0..200 W. F. Lunnon, The Pascal matrix, Fib. Quart. vol. 15 (1977) pp. 201-204. EXAMPLE 1 + 9*x + 72*x^2 + 626*x^3 + 6084*x^4 + 64974*x^5 + 744193*x^6 + 8965323*x^7 + ... MAPLE f:= n -> coeff(LinearAlgebra:-CharacteristicPolynomial(Matrix(n+2, n+2, (i, j) -> -binomial(i+j-2, i-1)), lambda), lambda, 2): map(f, [\$0..20]); # Robert Israel, Jul 09 2018 PROG (PARI) {a(n) = if( n<0, 0, polcoeff( charpoly( matrix( n+2, n+2, i, j, -binomial( i+j-2, i-1))), 2))} /* Michael Somos, Jul 10 2002 */ CROSSREFS Cf. A045912, A006134, A006136. Sequence in context: A033135 A127053 A001809 * A180836 A218126 A133672 Adjacent sequences:  A006132 A006133 A006134 * A006136 A006137 A006138 KEYWORD nonn,easy AUTHOR EXTENSIONS Edited by Michael Somos, Jul 19 2002 STATUS approved

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Last modified July 1 11:55 EDT 2022. Contains 354972 sequences. (Running on oeis4.)