133561domain: NAppears in sequencesa(n)=(n^4-n^3-n^2-n)/2.at n=23A171129Number of length 3+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero.at n=31A250322Values m that allow maximum period in the Blum-Blum-Shub x^2 mod m pseudorandom number generator.at n=16A338407