

A038200


Row sums of triangle K(m, n), inverse to triangle T(m,n) in A020921.


6



1, 0, 1, 3, 8, 21, 54, 134, 318, 720, 1560, 3259, 6641, 13391, 27107, 55657, 116244, 245823, 521738, 1101566, 2299215, 4730990, 9601095, 19273729, 38446742, 76598275, 153119606, 308061214, 624460449, 1274268038, 2611866713, 5362888620, 11003127203, 22516189988
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OFFSET

1,4


COMMENTS

The triangle K is A126713.


LINKS

Table of n, a(n) for n=1..34.
Temba Shonhiwa, A Generalization of the Euler and Jordan Totient Functions, Fib. Quart., 37 (1999), 6776.
N. J. A. Sloane, Transforms


FORMULA

Inverse binomial transform of tau(n) = A000005(n): Sum_{k=0..n} (1)^(nk)*binomial(n, k)*A000005(k).  Vladeta Jovovic, Oct 29 2002
E.g.f.: exp(x)*Sum_{k>=1} d(k)*x^k/k!.  Ilya Gutkovskiy, Nov 26 2017


CROSSREFS

Cf. A126713, A020921.
Sequence in context: A166287 A186812 A027930 * A291039 A030015 A318567
Adjacent sequences: A038197 A038198 A038199 * A038201 A038202 A038203


KEYWORD

sign


AUTHOR

Temba Shonhiwa (Temba(AT)maths.uz.ac.zw)


EXTENSIONS

Better description from Michael Somos


STATUS

approved



