122823

Appears in sequences

• a(n)=the (1,1)-term of M^(n-1), where M=matrix(5,5, [3,-1,-1,-1,-1; 1,3,-1,-1,-1; 1,1,3,-1,-1; 1,1,1,3,-1; 1,1,1,1,3]).at n=9A123220
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-1111 pattern in any orientation.at n=11A146866
• First of three consecutive numbers with at least one 3 in their prime signature.at n=13A176350