A327026 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A327026

a(n) = (1/n) Sum_{k=0..n} Sum_{d|n} phi(d) A241171(n/d, k) for n >= 1, a(0) = 1.

1

1, 1, 4, 41, 979, 40549, 2571724, 231313681, 28007660854, 4392400716381, 866132386622878, 209744116289535001, 61192264076350570149, 21169177815206345045941, 8568352429497412897973944, 4011525608882608159230362521, 2151041235686896366408288920529

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Table of n, a(n) for n=0..16.

MAPLE

seq(add(A327027(n, k), k=0..n), n=0..18);

MATHEMATICA

a[n_] := Sum[A327027[n, k], {k, 0, n}]; Table[a[n], {n, 0, 16}]

CROSSREFS

Row sums of A327027.

Sequence in context: A265003 A193363 A284276 * A244751 A022515 A172496

Adjacent sequences: A327023 A327024 A327025 * A327027 A327028 A327029

KEYWORD

nonn

AUTHOR

Peter Luschny, Aug 20 2019

STATUS

approved