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A356350
Primitive terms of A357769: terms of A357769 that are not ten times another term of A357769.
1
1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 18, 24, 36, 48, 102, 108, 110, 112, 114, 126, 132, 140, 150, 156, 190, 204, 210, 216, 220, 224, 228, 230, 252, 264, 270, 280, 306, 312, 330, 336, 396, 408, 420, 440, 448, 460, 510, 540, 550, 624, 630, 660, 690, 756, 770, 840, 880
OFFSET
1,2
COMMENTS
This sequence is infinite as it contains A133384.
Each term of A357769 can be uniquely written as a(m)*10^z for some m > 0 and z >= 0.
EXAMPLE
230 is a term as 230 belongs to A357769 and 23 does not belong to A357769.
756 is a term as 756 belongs to A357769 and is not divisible by 10.
PROG
(PARI) isA357769(n, base=10) = { my (d=digits(n, base), s=0); for (k=1, #d, if (n % (s+=d[k]), return (0)); ); return (1) }
is(n, base=10) = isA357769(n, base) && (n%base || !isA357769(n/base, base))
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Bernard Schott and Rémy Sigrist, Oct 15 2022
STATUS
approved