130026domain: NAppears in sequencesPartial sums of naughty primes A164968.at n=3A173029a(n) = the smallest k such that k^2+1 = p*A002144(n)^2, p prime of A002144 .at n=24A174492Number of (w,x,y,z) with all terms in {1,...,n} and 3w<x+y+z+n.at n=20A212249