A275671 - OEIS

A275671

Even values produced by the sigma function A000203, in increasing order.

4, 6, 8, 12, 14, 18, 20, 24, 28, 30, 32, 36, 38, 40, 42, 44, 48, 54, 56, 60, 62, 68, 72, 74, 78, 80, 84, 90, 96, 98, 102, 104, 108, 110, 112, 114, 120, 124, 126, 128, 132, 138, 140, 144, 150, 152, 156, 158, 160, 162, 164, 168, 174, 176, 180, 182, 186, 192, 194

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OFFSET

1,1

COMMENTS

Even terms of A002191.

Complement of A060657 with respect to A002191.

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

8 is in the sequence because sigma(7) = 8 and it's an even number.

PROG

(Magma) Set(Sort([SumOfDivisors(n): n in[1..1000] | not IsOdd(SumOfDivisors(n)) and SumOfDivisors(n) le 1000]))