A030276 Shifts left under COMPOSE transform.

2, 4, 24, 304, 7072, 294208, 22272896, 3156061952, 857517830656, 454271687304192, 474176281265526784, 981485679577766473728, 4043641804936271388647424, 33230444803201427664559095808

Offset

1,1

Links

Table of n, a(n) for n=1..14.

N. J. A. Sloane, Transforms

Formula

a(n)=T(n,1), T(n,m)=m/n*sum(k=1..n, T(n-m,k)*2^(n-k)*binomial(n,k)), n>m, T(n,n)=2^n. [Vladimir Kruchinin, Aug 08 2013]

Prog

(Maxima) T(n, m):=if m=n then 2^m else m/n*sum(T(n-m, k)*2^(n-k)*binomial(n, k), k, 1, n); makelist(T(n, 1), n, 1, 15); [Vladimir Kruchinin, Aug 08 2013]

Crossrefs

Sequence in context: A062531 A141599 A047677 * A081476 A241806 A009273

Adjacent sequences: A030273 A030274 A030275 * A030277 A030278 A030279

Keyword

nonn,eigen

Author

Christian G. Bower

Status

approved