34972

Appears in sequences

• Number of n X n 0..2 symmetric matrices with every element equal to zero, one, three or four horizontal and vertical neighbors, and new values 0..2 introduced in lower triangle row major order.at n=4A210909
• Palindromic numbers in bases 3 and 6 written in base 10.at n=12A259375
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384650.at n=61A384654