1,1

A subsequence of Ruth-Aaron numbers A039752. The terms are by definition of the form n = 4k+3.

Table of n, a(n) for n=1..56.

(PARI) forstep( n=3, 999, 4, bigomega(n)==2 & bigomega((n+1)/4)==2 && print1(n", "))

Cf. A001414.

Sequence in context: A202237 A080774 A146319 * A233561 A114988 A130871

Adjacent sequences: A238602 A238603 A238604 * A238606 A238607 A238608

nonn

M. F. Hasler, Mar 01 2014

approved