21034

Appears in sequences

• Expansion of Molien series for 16-dimensional real Clifford group C_4 of genus 4 and order 178362777600.at n=28A110160
• Number of n X n binary arrays with every 1 adjacent to at least one other 1 both bishopwise and rookwise but with no three 1s in a row bishopwise or rookwise.at n=5A144235
• Dispersion of (5*n-floor(n*sqrt(5))), by antidiagonals.at n=56A191539
• a(n) = 2*A052186(n) - n!.at n=8A201684
• Triangle read by rows, T(n,k) = !n + (k-1)*(n-1)!, with n>=1, 1<=k<=n; Position of the first n-letter permutation beginning with number k in the list of lexicographically sorted permutations A030299.at n=31A237450
• Indices of primes in the 10th-order Fibonacci number sequence, A127194.at n=36A257073
• Positions of 0's in A330314.at n=24A330325