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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
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: A066671 A159802 A329586 * A292929 A049627 A278223
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 21 2015
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)