1,1
Also, numbers n such that antisigma(n) = antisigma(n-1), where antisigma(n) = A024816(n) = the sum of the non-divisors of n that are between 1 and n.
Numbers n such that A163553(n-1) = 0.
Table of n, a(n) for n=1..5.
a(n) = A067816(n) + 1.
6 is in sequence because antisigma(6) = antisigma(5) = 9.
Cf. A067816, A024816 (antisigma(n)), A231546 (numbers n such that sigma(n) = sigma(n-1)).
Sequence in context: A114045 A116899 A162146 * A055698 A121167 A115658
Adjacent sequences: A231542 A231543 A231544 * A231546 A231547 A231548
nonn
Jaroslav Krizek, Nov 11 2013
approved
