login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Difference of base and exponent of prime powers (cf. A000961).
4

%I #11 Jul 13 2013 12:04:11

%S 1,1,2,0,4,6,-1,1,10,12,-2,16,18,22,3,0,28,30,-3,36,40,42,46,5,52,58,

%T 60,-4,66,70,72,78,-1,82,88,96,100,102,106,108,112,9,2,126,-5,130,136,

%U 138,148,150,156,162,166,11,172,178,180,190,192,196,198,210

%N Difference of base and exponent of prime powers (cf. A000961).

%C a(1) = 1 by convention, in accordance with A025473(1) = 1 and A025474(1) = 0.

%C a(n) = A025473(n)-A025474(n) = A192134(n)*A025473(n)/A000961(n);

%C A006093 and A090076 are subsequences.

%H Reinhard Zumkeller, <a href="/A192133/b192133.txt">Table of n, a(n) for n = 1..10000</a>

%K sign

%O 1,3

%A _Reinhard Zumkeller_, Jun 26 2011