OFFSET
1,1
COMMENTS
If n is in this sequence, then so is n+121. - Max Alekseyev, Feb 02 2015
FORMULA
Notice that 22! = 2^19 * 3^9 * 5^4 * 7^3 * 11^2 * 13 * 17 * 19. All these prime powers divide (n^1 + 1)*(n^2 + 2)*(n^3 +3)*...*(n^22 + 22), except for 11^2. 11^2 does not divide (n^1 + 1)*(n^2 + 2)*(n^3 + 3)*...*(n^22 + 22) for n = 7, 18, 29, 40, 51, 62, 73, 84, 95, 106 modulo 121. That is, d(n) is nonintegral for n the form 11m+7 but not 121m+117, and so are e(n) and f(n). - Max Alekseyev, Nov 10 2007
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander R. Povolotsky, Sep 25 2007
EXTENSIONS
Initial terms were calculated by Peter J. C. Moses; see comment in A129995.
More terms from Max Alekseyev, Feb 02 2015
STATUS
approved