1,2

Table of n, a(n) for n=1..66.

with(numtheory): seq(`if`(sigma(i+2)-sigma(i+1)<(sigma(i+1)-sigma(i)), i, print( )), i=1..133);

Cf. A000203, A053223, A053228.

Sequence in context: A064679 A081874 A165747 * A157142 A247328 A004273

Adjacent sequences: A053226 A053227 A053228 * A053230 A053231 A053232

nonn

Asher Auel (asher.auel(AT)reed.edu) Dec 10, 2000

approved