A343979 - cp's OEIS frontend

A343979 Composite numbers m such that lambda(m) = lambda(D_{m-1}), where lambda(n) is the Carmichael function of n (A002322) and D_k is the denominator (A027642) of Bernoulli number B_k.

n	a(n)
1	5615659951
2	36901698733
3	55723044637
4	776733036121
5	2752403727511
6	7725145165297
7	14475486778537
8	15723055492417
9	22824071195485
10	29325910221631
11	54669159894469
12	62086332981241
13	125685944708905
14	180225455689481
15	298620660945331
16	335333122310629
17	426814989321721

[5615659951, 36901698733, 55723044637, 776733036121, 2752403727511, 7725145165297, 14475486778537, 15723055492417, 22824071195485, 29325910221631, 54669159894469, 62086332981241, 125685944708905, 180225455689481, 298620660945331, 335333122310629, 426814989321721]

cp's OEIS Frontend

A343979 Composite numbers m such that lambda(m) = lambda(D_{m-1}), where lambda(n) is the Carmichael function of n (A002322) and D_k is the denominator (A027642) of Bernoulli number B_k.

Table of values

List of values