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A259709
a(n) = A259708(n,n-1).
2
0, -1, 0, 4, 22, 78, 240, 679, 1828, 4762, 12132, 30432, 75504, 185875, 455040, 1109540, 2697698, 6545670, 15859128, 38384099, 92832716, 224399570, 542226888, 1309862496, 3163659744, 7640066759, 18448657344, 44545569508, 107553559150, 259675788510
OFFSET
1,4
LINKS
L. Carlitz, Some polynomials related to Fibonacci and Eulerian numbers, Fib. Quart., 16 (1978), 217. (Annotated scanned copy)
L. Carlitz, Some polynomials related to Fibonacci and Eulerian numbers, Fib. Quart., 16 (1978), 216-226.
FORMULA
Empirical: a(n) = 4*a(n-1) - 2*a(n-2) - 6*a(n-3) + 2*a(n-4) + 4*a(n-5) + a(n-6). - Eric M. Schmidt, Jul 10 2015
Empirical: G.f.: -x^2*(-1+2*x^2+4*x) / ( (x^2+2*x-1)*(x^2+x-1)^2 ). - R. J. Mathar, Jul 15 2015
CROSSREFS
Cf. A259708.
Sequence in context: A062966 A347722 A201127 * A078155 A237530 A096167
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jul 05 2015
EXTENSIONS
More terms from Eric M. Schmidt, Jul 10 2015
STATUS
approved