A038341 Fourth line of 5-wave sequence A038201.

1, 2, 14, 29, 175, 365, 2163, 4516, 26703, 55759, 329615, 688286, 4068623, 8495917, 50221212, 104869718, 619907431, 1294463368, 7651850657, 15978257251, 94450905714, 197228218022, 1165858298498, 2434493909304, 14390815650209

Offset

0,2

Links

Table of n, a(n) for n=0..24.

F. v. Lamoen, Wave sequences

Formula

G.f.: (x^3+x^2-2*x-1) / (x^10-9*x^8+28*x^6-35*x^4+15*x^2-1). - Alois P. Heinz, Jul 16 2009

Maple

a:= n-> (Matrix([[`if`(irem(n, 2)=0, 1, 2), 0, 0, 0, -1]]). Matrix(5, (i, j)-> if i=j-1 then 1 elif j=1 then [15, -35, 28, -9, 1][i] else 0 fi) ^iquo(n, 2))[1, 1]: seq(a(n), n=0..30); # Alois P. Heinz, Jul 16 2009

Crossrefs

Cf. A038201.

Sequence in context: A157023 A101554 A057018 * A075718 A259710 A093794

Adjacent sequences: A038338 A038339 A038340 * A038342 A038343 A038344

Keyword

nonn,easy

Author

Floor van Lamoen

Extensions

More terms from Alois P. Heinz, Jul 16 2009

Status

approved