74328domain: NAppears in sequencesp-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - S^6.at n=28A291381a(n) is the determinant of the 2 X 2 matrix whose entries (when read by rows) are the n-th primes ending in 1, 3, 7, 9 respectively.at n=27A335592