A365390 Inverse permutation of A356867, where A356867 is Sycamore's Doudna variant D(3).

1, 2, 3, 5, 4, 6, 10, 8, 9, 7, 28, 15, 82, 11, 12, 17, 244, 18, 730, 14, 30, 29, 2188, 24, 13, 83, 27, 20, 6562, 21, 19684, 26, 84, 245, 19, 45, 59050, 731, 246, 23, 177148, 33, 531442, 32, 36, 2189, 1594324, 51, 37, 16, 732, 86, 4782970, 54, 31, 35, 2190, 6563, 14348908, 42, 43046722, 19685, 90, 53, 85, 87, 129140164

Offset

1,2

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program

Index entries for sequences that are permutations of the natural numbers

Formula

For all n >= 1, A356867(a(n)) = n.

Prog

(PARI)
up_to = 1+(3^15);
A365390list(up_to) = { my(v=vector(up_to), met=Map(), h=0, ak); for(i=1, #v, if(1==vecsum(digits(i, 3)), v[i] = i; h = i, ak = v[i-h]; forprime(p=2, , if(3!=p && !mapisdefined(met, p*ak), v[i] = p*ak; break))); mapput(met, v[i], i)); my(invs=List([]), x); for(i=1, oo, if(mapisdefined(met, i, &x), listput(invs, x), if(isprime(i)&&i>4, listput(invs, 1+(3^(primepi(i)-2))), return(Vec(invs))))); };
v365390 = A365390list(up_to);
A365390(n) = v365390[n];
for(n=1, #v365390, print1(A365390(n), ", "));
(PARI) See Links section.

Crossrefs

Cf. A365389 (one less), A356867 (inverse), A364958 (fixed points).

Cf. also A005941.

Sequence in context: A374404 A097347 A356867 * A359557 A114744 A352715

Adjacent sequences: A365387 A365388 A365389 * A365391 A365392 A365393

Keyword

nonn

Author

Antti Karttunen, Sep 15 2023

Status

approved