A166703 - OEIS

%I #6 Nov 03 2013 21:22:46

%S 1,7,13,49,55,91,97,343,169,385,391,637,643,679,715,2401,2407,1183,

%T 1189,2695,1261,2737,2743,4459,3025,4501,2197,4753,4759,5005,5011,

%U 16807,5083,16849,5335,8281,8287,8323,8359,18865,18871,8827,8833,19159,9295,19201

%N Totally multiplicative sequence with a(p) = a(p-1) + 6 for prime p.

%F Multiplicative with a(p^e) = (a(p-1)+6)^e. If n = Product p(k)^e(k) then a(n) = Product (a(p(k)-1)+6)^e(k).

%o (PARI) a(n)={n=factor(n); n[,1]=apply(p->a(p-1)+6,n[,1]); factorback(n)} \\ - _M. F. Hasler_, Nov 03 2013

%K nonn,mult

%O 1,2

%A _Jaroslav Krizek_, Oct 18 2009