A132479 Row sums of triangle A132478.

1, 5, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648, 4294967296, 8589934592

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (2).

Formula

a(0) = 1, a(2) = 5, a(n) = 2^(n+2) for n > 1.

G.f.: -(1 + 3*x + 6*x^2)/(-1 + 2*x). - R. J. Mathar, Nov 14 2007

E.g.f.: 4*exp(2*x) - 3*(1 + x). - Stefano Spezia, Feb 20 2023

Example

a(3) = 32 = sum of row 3 terms of triangle A132478: (4 + 9 + 18 + 1).
a(3) = 32 = 2^5.

Crossrefs

Cf. A000079, A132478.

Sequence in context: A222535 A063076 A270805 * A045944 A038361 A227719

Adjacent sequences: A132476 A132477 A132478 * A132480 A132481 A132482

Keyword

nonn,easy

Author

Gary W. Adamson, Aug 23 2007

Extensions

More terms from Stefano Spezia, Feb 20 2023

Status

approved