oeis.org

A169604 - OEIS

3, 18, 108, 648, 3888, 23328, 139968, 839808, 5038848, 30233088, 181398528, 1088391168, 6530347008, 39182082048, 235092492288, 1410554953728, 8463329722368, 50779978334208, 304679870005248, 1828079220031488, 10968475320188928, 65810851921133568, 394865111526801408

COMMENTS

Essentially first differences of A125682.

Binomial transform of A005053 without initial term 1.

Second binomial transform of A164346.

Inverse binomial transform of A169634.

Second inverse binomial transform of A103333 without initial term 1.

FORMULA

a(n) = 6*a(n-1) for n > 0; a(0) = 3.

G.f.: 3/(1-6*x).

MATHEMATICA

3*6^Range[0, 25] (* Paolo Xausa, Jan 17 2025 *)

PROG

(Magma) [ 3*6^n: n in [0..19] ];