A264724 - OEIS

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A264724

a(n) = n^2 + phi(n).

2, 5, 11, 18, 29, 38, 55, 68, 87, 104, 131, 148, 181, 202, 233, 264, 305, 330, 379, 408, 453, 494, 551, 584, 645, 688, 747, 796, 869, 908, 991, 1040, 1109, 1172, 1249, 1308, 1405, 1462, 1545, 1616, 1721, 1776, 1891, 1956, 2049, 2138, 2255, 2320, 2443, 2520

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

FORMULA

a(n) = A000290(n) + A000010(n).

EXAMPLE

a(5) = 29, because phi(5) = 4 and 5^2 + 4 = 29.

MATHEMATICA

Table[n^2 + EulerPhi[n], {n, 50}]

PROG