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A196750
Numbers n such that 3, 5, 7 and 11 do not divide swing(n) = A056040(n).
3
0, 1, 2, 6320
OFFSET
1,3
COMMENTS
It is conjectured that there are no other terms.
MAPLE
# The function Search is defined in A196747.
A196750_list := n -> Search(n, [3, 5, 7, 11]): # n is a search limit
PROG
(PARI) valp(n, p)=my(s); while(n\=p, s+=n); s
is(n)=valp(n, 3)==2*valp(n\2, 3) && valp(n, 5)==2*valp(n\2, 5) && valp(n, 7)==2*valp(n\2, 7) && valp(n, 11)==2*valp(n\2, 11) \\ Charles R Greathouse IV, Feb 02 2016
KEYWORD
nonn,bref
AUTHOR
Peter Luschny, Oct 06 2011
STATUS
approved