149941

Appears in sequences

• Number of regions in regular n-gon with all diagonals drawn.at n=44A007678
• Expansion of 1/((1-3x)(1-4x)(1-11x)(1-12x)).at n=4A028052
• Concatenation of n-th prime and its reverse.at n=34A067087
• a(n) = A194588(n) - A005043(n); complementary Riordan numbers.at n=14A194589
• a(n) = A007678(2*n+1).at n=22A341735