OFFSET
0,3
COMMENTS
The alternating row sums of odd rows in A238453 are 0.
LINKS
Tom Edgar, Totienomial Coefficients, INTEGERS, 14 (2014), #A62.
FORMULA
a(n) = Sum_{k=0..2n}(-1)^k*A238453(2n,k).
PROG
(Sage)
P=[euler_phi(i) for i in [0..100]]
Tr=[[prod(P[1:n+1])/(prod(P[1:k+1])*prod(P[1:(n-k)+1])) for k in [0..n]] for n in [0..len(P)-1]]
L=[sum((-1)^i*x[i] for i in [0..len(x)-1]) for x in Tr]
print([y for y in L if y!=0])
CROSSREFS
KEYWORD
nonn
AUTHOR
Tom Edgar, Apr 21 2016
STATUS
approved