Decompose the multiplicative group of integers modulo N as a product of cyclic groups C_{k_1} x C_{k_2} x ... x C_{k_m}, where k_i divides k_j for i < j, then a(n) is the smallest N such that the product contains a copy of C_{2n}.
A302099
Decompose the multiplicative group of integers modulo N as a product of cyclic groups C_{k_1} x C_{k_2} x ... x C_{k_m}, where k_i divides k_j for i < j, then a(n) is the smallest N such that the product contains a copy of C_{2n}.
Terms
- a(0) =3a(1) =5a(2) =7a(3) =32a(4) =11a(5) =13a(6) =1247a(7) =17a(8) =19a(9) =25a(10) =23a(11) =224a(12) =4187a(13) =29a(14) =31a(15) =128a(16) =14111a(17) =37a(18) =43739a(19) =41a(20) =43a(21) =115a(22) =47a(23) =119a(24) =15251a(25) =53a(26) =81a(27) =928a(28) =59a(29) =61
External references
- oeis: A302099