216473

Appears in sequences

• G.f. = b(2)*b(4)*b(6)/(x^8+x^6-x^5+x^4-2*x^3-x+1), where b(k) = (1-x^k)/(1-x).at n=23A266340
• a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly 2 ways.at n=31A377729
• a(n) = Sum_{k=0..n} (-1)^k * binomial(n+k-1,n-k) * Fibonacci(k+1).at n=19A390850