A186339 a(n)=A006125(n+1)*2^A001840(n).

1, 4, 32, 512, 32768, 4194304, 1073741824, 1099511627776, 2251799813685248, 9223372036854775808, 151115727451828646838272, 4951760157141521099596496896, 324518553658426726783156020576256, 85070591730234615865843651857942052864

Offset: 0

Author

Paul Barry, Feb 18 2011

Keywords

• nonn
• easy

Comments

Hankel transform of A186338.

Formula

a(n)=2^binomial(n+1,2)*2^floor((n+1)(n+2)/6).