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A324468 a(n)=r(n)+r(n+1)+r(n+2), where r(n) is the ruler sequence A007814. 1
1, 3, 2, 3, 1, 4, 3, 4, 1, 3, 2, 3, 1, 5, 4, 5, 1, 3, 2, 3, 1, 4, 3, 4, 1, 3, 2, 3, 1, 6, 5, 6, 1, 3, 2, 3, 1, 4, 3, 4, 1, 3, 2, 3, 1, 5, 4, 5, 1, 3, 2, 3, 1, 4, 3, 4, 1, 3, 2, 3, 1, 7, 6, 7, 1, 3, 2, 3, 1, 4, 3, 4, 1, 3, 2, 3, 1, 5, 4, 5, 1, 3, 2, 3, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..10000

MATHEMATICA

Table[Sum[IntegerExponent[n + k, 2], {k, 0, 2}], {n, 100}] (* Vincenzo Librandi, Mar 10 2019 *)

PROG

(MAGMA) [&+[Valuation(n+k, 2): k in [0..2]]: n in [1..70]]; // Vincenzo Librandi, Mar 10 2019

(PARI) a(n) = sum(k=0, 2, valuation(n+k, 2)); \\ Michel Marcus, Mar 10 2019

CROSSREFS

Cf. A001511, A007814, A050603 (r(n)+r(n+1)), A324465.

Sequence in context: A213940 A236027 A220128 * A131498 A236455 A033093

Adjacent sequences:  A324465 A324466 A324467 * A324469 A324470 A324471

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 03 2019

STATUS

approved

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Last modified March 29 18:26 EDT 2020. Contains 333116 sequences. (Running on oeis4.)