A028965 Six consecutive integers with increasing values of sigma start at these numbers; i.e., sigma(x) < sigma(x+1) < ... < sigma(x+5).

36721681, 69514441, 96375121, 151676521, 165370201, 230678521, 240103321, 245370121, 339063721, 343388041, 347425921, 351676321, 357081721, 455460001, 461586121, 500865361, 630955321, 774378601, 863747881, 979521721, 1019063041, 1043567521, 1075999921

Offset: 1

Author

Jud McCranie, Jan 02 2000

Keywords

• nonn

Comments

What is the first number to start a run of exactly 5 nondecreasing values of sigma? - M. F. Hasler, May 06 2017

The first run of exactly 5 nondecreasing values starts at 356067536821, see A285893. - Giovanni Resta, May 07 2017

Examples

			sigma(36721681) = 37085364 < sigma(36721682) = 55082526 < ... < sigma(36721686) = 76876128, so 36721681 is in the sequence.
		

Links

• Donovan Johnson, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000203, A285893.

Extensions

Name corrected by Harvey P. Dale, Apr 19 2011