A335116 -id:A335116 - cp's OEIS frontend

A335117 Records in A304480.

1, 3, 25, 241, 505, 65521, 131041, 171865, 138181681, 6814407601, 20174525281, 45185409361, 558781423201, 685933859521, 2601256998740401, 4578654981700801, 15571124394460034401, 375159113055066740401, 124708934978441512498801, 127589793288205521873601, 8644416283014847832296801, 29217965124687229769336641

Offset: 1

Seiichi Manyama, May 24 2020

nonn

Seiichi Manyama, Table of n, a(n) for n = 1..85
Project Euler, Problem 533 - Minimum values of the Carmichael function
Wikipedia, Carmichael function

Cf. A304480, A335116, A335128.

a(n) = A304480(A335116(n)).

a(n) = A335128(n-1)+1 for n > 2.

A304480 a(n) is the least m such that lambda(k) >= n for all k >= m where lambda is A002322, the Carmichael lambda function.

Original entry on oeis.org

1, 3, 25, 25, 241, 241, 505, 505, 505, 505, 505, 505, 65521, 65521, 65521, 65521, 65521, 65521, 65521, 65521, 65521, 65521, 65521, 65521, 131041, 131041, 131041, 131041, 131041, 131041, 171865, 171865, 171865, 171865, 171865, 171865, 138181681, 138181681, 138181681, 138181681, 138181681, 138181681

Offset: 1

Michel Marcus, May 13 2018

nonn

Seiichi Manyama, Table of n, a(n) for n = 1..5000
Project Euler, Problem 533 - Minimum values of the Carmichael function
Wikipedia, Carmichael function

Cf. A002174, A002322, A002396, A141162, A143407, A335116, A335117.

minvl(n, v) = {vgt = select(x->(x>=n), v, 1); first = vgt[1]; vgtd = vector(#vgt-1, k, vgt[k+1] - vgt[k]); vgtdr = Vecrev(vgtd); vokdiff = select(x->x!=1, vgtdr, 1); if (#vokdiff, #v - vokdiff[1]+1, first);}
lista(nn) = {v = read("v002322.txt"); for (n=1, nn, print1(minvl(n, v), ", "););}

a(32) and beyond from Seiichi Manyama, May 24 2020

cp's OEIS Frontend

A335117 Records in A304480.

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A304480 a(n) is the least m such that lambda(k) >= n for all k >= m where lambda is A002322, the Carmichael lambda function.

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