A220662 - OEIS

%I #11 Apr 17 2013 17:14:15

%S 1,2,2,4,4,6,6,6,9,9,9,12,12,12,15,15,15,18,18,18,21,21,21,24,24,24,

%T 24,28,28,28,28,32,32,32,32,36,36,36,36,40,40,40,40,44,44,44,44,48,48,

%U 48,48,52,52,52,52,56,56,56,56,60,60,60,60,64,64,64,64,68

%N Irregular table: row n (n>=1) consists of A084556(n) copies of A130664(n).

%C The term a(n) gives the position of the first term in A030298 which belongs to the same permutation as A030298(n) itself.

%H A. Karttunen, <a href="/A220662/b220662.txt">Rows 1..998 of the irregular table, flattened.</a>

%F a(n) = A130664(A084557(n)) = A084555(A084557(n)-1)+1.

%F a(A130664(n)) = A130664(n).

%e Rows of this irregular table begin as:

%e 1;

%e 2, 2;

%e 4, 4;

%e 6, 6, 6;

%e 9, 9, 9;

%o (define (A220662 n) (1+ (A084555 (-1+ (A084557 n)))))

%Y Cf. A220663, A220660, A030298.

%K nonn,tabf

%O 1,2

%A _Antti Karttunen_, Dec 18 2012