A226753 Numbers n such that sigma(n) + sigma(n+1) + sigma(n+2) = sigma(n+3) + sigma(n+4) + sigma(n+5).

52, 56, 2199, 17312, 92444, 31768040, 41159079, 52236776, 79563436, 683321810, 689969123, 757808252, 881421986, 910016369, 22184779055

Offset: 1

Author

Alex Ratushnyak, Jun 16 2013

Keywords

• nonn
• more

Comments

The sequence of corresponding sums begins: 272, 290, 10820, 86514, 473568, 162349956, 203060920, 258797664, 398693936, 3418531584, 3544794576, 3812186016, 4066082208, 4374966816.

Examples

			Sigma(52) + sigma(53) + sigma(54) = 98 + 54 + 120 = 272.
Sigma(55) + sigma(56) + sigma(57) = 72 + 120 + 80 = 272.
So 52 is in the sequence.
		

Crossrefs

Cf. A000203, A055574, A065900, A073500, A099632, A226361, A226475.

Extensions

a(15) from Giovanni Resta, Jun 17 2013