A341349 - OEIS

A341349

Numbers k for which A254049(k) is not a multiple of 3.

1, 3, 5, 6, 9, 11, 13, 15, 16, 20, 21, 23, 25, 28, 29, 30, 31, 35, 36, 37, 41, 43, 45, 46, 50, 51, 53, 54, 56, 57, 61, 63, 65, 67, 69, 71, 73, 75, 76, 77, 78, 79, 80, 81, 85, 90, 94, 95, 96, 98, 99, 100, 101, 103, 106, 113, 114, 116, 119, 120, 123, 124, 125, 130, 131, 135, 136, 138, 140, 141, 143, 145, 146, 147

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Numbers k for which A048673(2k-1) is of the form 3u+1.

Numbers k for which A292251(2k-1) is zero.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..16369

Index entries for sequences computed from indices in prime factorization

PROG

(PARI)

A003961(n) = { my(f=factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); }; \\ From A003961