A138476 Triangle read by rows: expansion of (1+3*t^2)/(1-t*(2*x-t)).

1, 0, 2, 2, 0, 4, 0, 2, 0, 8, -2, 0, 0, 16, 0, 6, 0, -8, 0, 32, 2, 0, -12, 0, -32, 64, 0, 10, 0, -16, 0, -96, 0, 128, -2, 0, 32, 0, 0, 0, -256, 0, 256, 0, -14, 0, 80, 0, 96, 0, -640, 0, 512

Offset

1,3

Comments

See A135929 and A138034 for further information.

References

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972; see Chapter 22.

Links

Table of n, a(n) for n=1..53.

Formula

G.f.: (1+3*t^2)/(1-t*(2*x-t)).

Crossrefs

Sequence in context: A090657 A167001 A108563 * A131381 A295215 A112080

Adjacent sequences: A138473 A138474 A138475 * A138477 A138478 A138479

Keyword

tabf,sign

Author

A. Bannour (managing_office069(AT)yahoo.fr), Mar 19 2008

Extensions

New name from Joerg Arndt, May 15 2016

Status

approved