

A134987


Third extended Jacobsthal recurrence: a(n)=4a(n1)6(n2)+4a(n3)a(n4)+2a(n5).


0



0, 0, 0, 0, 1, 4, 10, 20, 35, 58, 100, 192, 405, 880, 1874, 3844, 7631, 14886, 29020, 57192, 114249, 230300, 465226, 936948, 1877771, 3748498, 7470532, 14895728, 29749837, 59514152, 119166962, 238627620, 477606935, 955315390, 1909991772, 3818208792
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OFFSET

0,6


COMMENTS

See A134658. Sequence is identical to half its fourth differences from second term.


LINKS

Table of n, a(n) for n=0..35.
Index entries for linear recurrences with constant coefficients, signature (4, 6, 4, 1, 2).


FORMULA

O.g.f.: 1/[9(2x1)]+(4x^32x^21)/[9(x^4+2x^22x+1)].  R. J. Mathar, Feb 06 2008


MATHEMATICA

LinearRecurrence[{4, 6, 4, 1, 2}, {0, 0, 0, 0, 1}, 60] (* Harvey P. Dale, Jul 12 2011 *)


CROSSREFS

Sequence in context: A266353 A139748 A137359 * A261636 A058539 A008112
Adjacent sequences: A134984 A134985 A134986 * A134988 A134989 A134990


KEYWORD

nonn


AUTHOR

Paul Curtz, Feb 05 2008


EXTENSIONS

More terms from Harvey P. Dale, Jul 12 2011


STATUS

approved



