A085193 Repeating part of A085192.

2, 6, 2, 4, 18, 2, 6, 2, 4, 10, 2, 4, 8, 58, 2, 6, 2, 4, 18, 2, 6, 2, 4, 10, 2, 4, 8, 26, 2, 6, 2, 4, 10, 2, 4, 8, 18, 2, 4, 8, 16, 202, 2, 6, 2, 4, 18, 2, 6, 2, 4, 10, 2, 4, 8, 58, 2, 6, 2, 4, 18, 2, 6, 2, 4, 10, 2, 4, 8, 26, 2, 6, 2, 4, 10, 2, 4, 8, 18, 2, 4, 8, 16, 74, 2, 6, 2, 4, 18, 2, 6, 2, 4, 10

Offset

0,1

Links

Table of n, a(n) for n=0..93.

Antti Karttunen, Notes concerning A080237-tree and related sequences.

Formula

a(n) = A085192(A081291(n+1)-1).

a(n) = 4*A085193(A085182(n+1)-1) + 2 - (2^A007001(n+1)) if A007001(n+2)==1, otherwise 2^A007001(n+1).

Prog

(MIT/GNU Scheme) (define (A085193 nn) (let ((n (1+ nn))) (cond ((= 1 (A007001 (+ n 1))) (- (* 4 (A085193 (-1+ (A085182 n)))) (- (expt 2 (A007001 n)) 2))) (else (expt 2 (A007001 n))))))

Crossrefs

Same sequence divided by 2: A085194. Cf. A085190.

Sequence in context: A194953 A057606 A021385 * A220242 A220375 A220430

Adjacent sequences: A085190 A085191 A085192 * A085194 A085195 A085196

Keyword

nonn

Author

Antti Karttunen, Jun 14 2003

Status

approved