A328636 Numbers n for which A328578(n) = A257993(A276086(A276086(n))) = 6.

20, 22, 26, 40, 44, 46, 68, 70, 86, 92, 220, 224, 238, 248, 270, 272, 286, 356, 370, 424, 428, 500, 538, 544, 584, 622, 630, 682, 728, 766, 836, 896, 910, 934, 980, 1018, 1124, 1162, 1208, 1230, 1232, 1246, 1306, 1376, 1390, 1460, 1520, 1558, 1604, 1642, 1706, 1748, 1786, 1856, 1870, 1930, 2000, 2038, 2084, 2144, 2182, 2228, 2266

Offset: 1

Author

Antti Karttunen, Oct 27 2019

Keywords

• nonn

Comments

Numbers n for which A276087(n) is a multiple of 2310, but not of 13.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to primorial base

Crossrefs

Row 6 of A328631.

Cf. A257993, A276086, A328578.

Programs

PARI

A257993(n) = { for(i=1,oo,if(n%prime(i),return(i))); }
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
A328578(n) = A257993(A276086(A276086(n)));
isA328636(n) = (6==A328578(n));