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A255336 a(n) = A005811(A255056(n)); After the initial zero, the first differences of A255056. 4
0, 2, 2, 2, 4, 2, 2, 4, 4, 4, 2, 2, 2, 4, 6, 4, 4, 4, 4, 2, 2, 2, 4, 6, 4, 6, 6, 4, 2, 4, 6, 4, 4, 4, 4, 2, 2, 2, 4, 6, 4, 6, 4, 4, 6, 6, 6, 6, 6, 4, 2, 4, 6, 4, 6, 6, 4, 2, 4, 6, 4, 4, 4, 4, 2, 2, 2, 4, 6, 4, 6, 4, 4, 6, 6, 6, 6, 4, 4, 6, 6, 6, 8, 6, 6, 6, 6, 6, 6, 4, 2, 4, 6, 4, 6, 4, 4, 6, 6, 6, 6, 6, 4, 2, 4, 6, 4, 6, 6, 4, 2, 4, 6, 4, 4, 4, 4, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

First differences of A255056, shifted once right (prepended with zero).

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..8590

FORMULA

a(n) = A005811(A255056(n)).

a(0) = 0; and for n >= 1: a(n) = A255056(n) - A255056(n-1).

a(n) = 2*A255337(n).

PROG

(Scheme, two versions)

(define (A255336 n) (A005811 (A255056 n)))

(define (A255336 n) (if (zero? n) n (- (A255056 n) (A255056 (- n 1)))))

CROSSREFS

First differences of A255056.

Terms of A255337 doubled.

Cf. A005811.

Analogous sequence: A213712.

Sequence in context: A188903 A066671 A159802 * A292929 A049627 A278223

Adjacent sequences:  A255333 A255334 A255335 * A255337 A255338 A255339

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 21 2015

STATUS

approved

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Last modified July 23 11:44 EDT 2019. Contains 325254 sequences. (Running on oeis4.)