A296076 Least number with the same prime signature as 1 + A002322(n), where A002322 is Carmichael's lambda.

2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 12, 2, 2, 2, 4, 2

Offset

1,1

Links

Antti Karttunen, Table of n, a(n) for n = 1..65537

Formula

a(n) = A046523(A263027(n)) = A046523(1+A002322(n)).

Prog

(PARI)
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); };  \\ This function from Charles R Greathouse IV, Aug 17 2011
A296076(n) = A046523(1+lcm(znstar(n)[2]));

Crossrefs

Cf. A002322, A046523, A263027, A263028 (positions of 2's), A296077, A296078.

Sequence in context: A194698 A105519 A111891 * A086858 A111892 A108248

Adjacent sequences: A296073 A296074 A296075 * A296077 A296078 A296079

Keyword

nonn

Author

Antti Karttunen, Dec 05 2017

Status

approved