

A142964


One half of second column (m=1) of triangle A142963.


3



1, 5, 15, 37, 83, 177, 367, 749, 1515, 3049, 6119, 12261, 24547, 49121, 98271, 196573, 393179, 786393, 1572823, 3145685, 6291411, 12582865, 25165775, 50331597, 100663243, 201326537, 402653127, 805306309, 1610612675, 3221225409, 6442450879, 12884901821
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OFFSET

0,2


COMMENTS

Contribution from Johannes W. Meijer, Feb 20 2009: (Start)
The A142964 (n) sequence is essentially a duplicate of the A050488 (n+1) sequence. The a(0)=0 of the latter sequence is the 'leading zero' of A142964 if we write A142963 as a matrix.
(End)


LINKS

Table of n, a(n) for n=0..31.


FORMULA

a(n)= A142693(n+2,1)/2.
Contribution from Johannes W. Meijer, Feb 20 2009: (Start)
a(n) = 4a(n1)5a(n2)+2a(n3) for n>2 with a(0) = 1, a(1) = 5, a(2) = 15.
G.f.: (1+z)/( (1z)^2*(12*z))
(End)


CROSSREFS

A142965 m=2 column/4.
Contribution from Johannes W. Meijer, Feb 20 2009: (Start)
Cf. A156925
Equals A050488(n+1)
Equals A156920(n+1,1)
Equals A156919(n+1,1)/2^n
(End)
Sequence in context: A213487 A005491 A050488 * A188282 A014316 A075717
Adjacent sequences: A142961 A142962 A142963 * A142965 A142966 A142967


KEYWORD

nonn,easy


AUTHOR

Wolfdieter Lang Sep 15 2008


STATUS

approved



