369985

Appears in sequences

• If S*2^k - 3 and S*2^k + 3 are primes for k=0 to 2, then a(n) = S/10.at n=20A093290
• Number of permutations of 3 indistinguishable copies of 1,...,n such that the first and second copies of j are adjacent and there are exactly j numbers between the second and the third copy of j.at n=14A264813
• a(n) = ((n + 1)^2 * (5*n + 4)*n) / 12.at n=30A368046