A132012 Records in A051445.

3, 5, 7, 15, 17, 19, 25, 35, 51, 69, 81, 87, 123, 129, 141, 159, 177, 255, 267, 275, 309, 321, 339, 393, 447, 489, 501, 519, 537, 705, 795, 807, 849, 879, 1029, 1245, 1257, 1605, 1671, 1689, 1707, 1761, 1779, 1797, 1851, 1923, 1929, 1941, 1959, 1977, 2505, 2595, 2685

Offset: 1

Author

N. J. A. Sloane, Nov 05 2007

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..4000
• Max Alekseyev, PARI/GP Scripts for Miscellaneous Math Problems (invphi.gp).

Crossrefs

Cf. A000010, A051445, A132115.

Programs

PARI

f(n) = {my(v = invphi(2*n)); if(#v == 0, 0, vecmin(v));} \\ using Max Alekseyev's invphi.gp
lista(kmax) = {my(fmax = -1, f1); for(k = 1, kmax, f1 = f(k); if(f1 > fmax, fmax = f1; print1(f1,", ")));} \\ Amiram Eldar, Nov 05 2024

Formula

a(n) = A051445(A132115(n)). - Amiram Eldar, Nov 05 2024