314028domain: NAppears in sequencesa(n) = A000217(A000041(n)).at n=21A086737Triangular numbers which are sums of 6 consecutive primes.at n=20A173423Number of (n+1) X 2 binary arrays with every 2 X 2 subblock sum equal to some horizontal or vertical neighbor 2 X 2 subblock sum.at n=10A185489