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A305658
Powers of 3 in base 3/2.
1
1, 20, 2100, 212000, 210110000, 21202200000, 21200101000000, 21011002020000000, 2120220212100000000, 2120012010112000000000, 2101102110221110000000000, 212211101110122200000000000, 212001222211110201000000000000, 210112102201222221020000000000000
OFFSET
0,2
COMMENTS
a(n) has n zeros at the end.
a(n) is A305659(n) with n zeros added at the end, where A305659(n) is powers of 2 in base 3/2.
LINKS
B. Chen, R. Chen, J. Guo, S. Lee et al., On Base 3/2 and its Sequences, arXiv:1808.04304 [math.NT], 2018.
FORMULA
a(n) = A024629(A000244(n)).
MAPLE
b:= proc(n) `if`(n<1, 0, irem(n, 3, 'q')+b(2*q)*10) end:
a:= n-> b(3^n):
seq(a(n), n=0..20); # Alois P. Heinz, Jun 18 2018
PROG
(PARI) f(n) = if( n<1, 0, f(n\3 * 2) * 10 + n%3);
a(n) = f(3^n); \\ Michel Marcus, Jun 18 2018
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Tanya Khovanova and PRIMES STEP Senior group, Jun 07 2018
STATUS
approved