A029911 Start with n; if prime, skip; repeatedly sum prime factors (counted with multiplicity) and add 1, until reach 1, 6 or a prime.

1, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 11, 7, 7, 11, 7, 7, 7, 11, 11, 7, 7, 13, 11, 7, 17, 7, 13, 7, 7, 7, 7, 7, 13, 11, 7, 7, 17, 7, 23, 11, 13, 7, 7, 13, 19, 17, 7, 7, 7, 13, 7, 7, 7, 19, 19, 7, 13, 7, 7, 23, 7, 7, 7, 7, 11, 7, 13, 13, 11, 7, 17, 7, 7, 23, 7, 7, 7, 7, 19, 41, 7

Offset

1,2

Links

Table of n, a(n) for n=1..83.

Example

20 -> 2+2+5+1 = 10 -> 2+5+1 = 8 -> 2+2+2+1 = 7.

Crossrefs

Cf. A029910.

Sequence in context: A212479 A095942 A139395 * A328941 A205691 A381565

Adjacent sequences: A029908 A029909 A029910 * A029912 A029913 A029914

Keyword

nonn

Author

Dann Toliver

Status

approved