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A358234
Number of ways 2n can be expressed as an unordered product of two natural numbers that do not generate any carries when added together in the primorial base.
2
1, 2, 2, 1, 1, 2, 2, 2, 3, 1, 1, 4, 2, 3, 3, 1, 1, 4, 2, 2, 4, 1, 1, 4, 2, 3, 4, 2, 1, 5, 2, 3, 3, 1, 2, 6, 2, 3, 4, 1, 1, 4, 2, 2, 5, 1, 1, 6, 3, 3, 3, 2, 1, 5, 2, 4, 4, 1, 1, 7, 2, 3, 6, 1, 2, 5, 2, 2, 3, 2, 1, 6, 2, 3, 4, 2, 2, 3, 2, 3, 4, 1, 1, 6, 2, 3, 2, 1, 1, 8, 3, 2, 4, 1, 2, 5, 2, 4, 5, 1, 1, 5, 2, 3, 6
OFFSET
1,2
FORMULA
a(n) = A358233(2*n).
PROG
(PARI) A358234(n) = A358233(n+n);
CROSSREFS
Bisection of A358233.
Sequence in context: A156268 A053257 A331002 * A349366 A151702 A151552
KEYWORD
nonn,base
AUTHOR
Antti Karttunen, Nov 26 2022
STATUS
approved