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A152450
a(0)=a(1)=1, a(2)=4, a(3)=7, a(n+4) = 10*a(n+2) - a(n).
0
1, 1, 4, 7, 39, 69, 386, 683, 3821, 6761, 37824, 66927, 374419, 662509, 3706366, 6558163, 36689241, 64919121, 363186044, 642633047, 3595171199, 6361411349, 35588525946, 62971480443, 352290088261, 623353393081, 3487312356664
OFFSET
0,3
FORMULA
G.f.: (1 + x - 6*x^2 - 3*x^3)/(1 - 10*x^2 + x^4). - Philippe Deléham and R. J. Mathar, Dec 04 2008
CROSSREFS
Sequence in context: A279830 A367775 A245305 * A059213 A093102 A199404
KEYWORD
easy,nonn
AUTHOR
Richard Choulet, Dec 04 2008
STATUS
approved