0,3

Binomial transform of A081674. Second binomial transform of A027649.

a(n)=(4*5^n-3*4^n-2^n)/6 G.f.: x(1-3x)/((1-2x)(1-4x)(1-5x))

Cf. A018678.

Sequence in context: A033463 A030279 A133357 this_sequence A081180 A052177 A115598

Adjacent sequences: A081672 A081673 A081674 this_sequence A081676 A081677 A081678

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Mar 28 2003